Interacting ghost dark energy in Brans-Dicke theory

International Nuclear Information System (INIS)

Ebrahimi, Esmaeil; Sheykhi, Ahmad

2011-01-01

We investigate the QCD ghost model of dark energy in the framework of Brans-Dicke cosmology. First, we study the non-interacting ghost dark energy in a flat Brans-Dicke theory. In this case we obtain the equation of state and the deceleration parameters and a differential equation governing the evolution of ghost energy density. Interestingly enough, we find that the equation of state parameter of the non-interacting ghost dark energy can cross the phantom line (w D =-1) provided the parameters of the model are chosen suitably. Then, we generalize the study to the interacting ghost dark energy in both flat and non-flat Brans-Dicke framework and find out that the transition of w D to phantom regime can be more easily achieved for than when resort to the Einstein field equations is made.

Motional frequency shifts of trapped ions in the Lamb-Dicke regime

International Nuclear Information System (INIS)

Lizuain, I.; Muga, J. G.; Eschner, J.

2007-01-01

First order Doppler effects are usually ignored in laser driven trapped ions when the recoil frequency is much smaller than the trapping frequency (Lamb-Dicke regime). This means that the central, carrier excitation band is supposed to be unaffected by vibronic transitions in which the vibrational number changes. While this is strictly true in the Lamb-Dicke limit (infinitely tight confinement), the vibronic transitions do play a role in the Lamb-Dicke regime. In this paper we quantify the asymptotic behavior of their effect with respect to the Lamb-Dicke parameter. In particular, we give analytical expressions for the frequency shift, 'pulling' or 'pushing', produced in the carrier absorption band by the vibronic transitions both for Rabi and Ramsey schemes. This shift is shown to be independent of the initial vibrational state

The correspondence of Thomas Dale (1700-1750): Botany in the transatlantic Republic of Letters.

Science.gov (United States)

Cook, William J

2012-03-01

This paper seeks to provide a full account of the life and career of Dr. Thomas Dale (1700-1750), with particular reference to his botanical works and correspondence. Born in Hoxton, London, Dale studied medicine at Leiden and engaged fully in the social, literary and epistolary network in which botany was practised in eighteenth-century England. In 1730, however, Dale relocated to the British colonial port of Charles Town, South Carolina. Here he continued to engage in a transatlantic network of botanical exchange and discussion, corresponding on equal and reciprocal terms with his former colleagues in England. Where Dale differs from naturalists in South Carolina before him is that his motives for pursuing botany and for corresponding with English naturalists were located firmly in the New World. Such a conclusion forms a valuable, albeit small contribution to models for the development of national scientific cultures in the imperial world. Similarly, Dale's pursuit of botanical information in South Carolina provides a small amount of material with which to illustrate currently fashionable models for the mediated exchange and circulation of scientific knowledge. Copyright © 2011 Elsevier Ltd. All rights reserved.

American AV: Edgar Dale and the Information Age Classroom.

Science.gov (United States)

Acland, Charles R

2017-01-01

This article demonstrates how the influential scholar Edgar Dale, alongside a generation of educational technologists, helped build an essential place for AV materials and pedagogical methods in the American classroom. It also shows that, for decades, the Payne Fund philanthropy supported multimedia research agendas that shaped ideas about teaching and technology, far beyond involvement in their famed studies on motion pictures and children in the 1930s. With his writings and research programs, Dale advanced concepts of media experience and systematicity, which came to be understood as common sense to the information society. In so doing he was a leading contributor to the discursive and ideological structure of our age of technological and informational abundance.

Stability of Brans-Dicke thin-shell wormholes

Energy Technology Data Exchange (ETDEWEB)

Yue, Xiaojun, E-mail: yuexiaojun@mail.bnu.edu.cn [Department of Physics, Beijing Normal University, Beijing 100875 (China); Gao, Sijie, E-mail: sijie@bnu.edu.cn [Department of Physics, Beijing Normal University, Beijing 100875 (China)

2011-06-06

Recently, a class of spherically symmetric thin-shell wormholes in Brans-Dicke gravity have been introduced. Such wormholes can be supported by matter satisfying the weak energy condition (WEC). In this Letter, we first obtain all the exact solutions satisfying the WEC. Then we show these solutions can be stable for certain parameters. A general requirement for stability is that β{sup 2}>1, which may imply that the speed of sound exceeds the speed of light. -- Highlights: → Brans-Dicke thin-shell wormholes can be stable and satisfy the energy condition. → Solutions exist for ω<-2. → The speed of sound in the matter exceeds the speed of light.

What We Talk around when We Talk about "The Dick"

Science.gov (United States)

Savage, Elizabeth

2011-01-01

Some years ago, the author had her first opportunity to teach an undergraduate American Romanticism course, which meant she had a chance to teach "Moby-Dick" the way she thought it should be taught. Meeting two days a week, her course was set up so that students read about thirty pages of "Moby-Dick" for one class meeting a week paired with…

Dale's Cone Revisited: Critically Examining the Misapplication of a Nebulous Theory to Guide Practice.

Science.gov (United States)

Subramony, Deepak, Prem

2003-01-01

Edgar Dale's (1946) Cone of Experience model-and various adaptations-have been used by practitioners for decades. However, little has been accomplished by way of examining and refining the model (and its associated theories). This article suggests several philosophical perspectives by which gaps in the prevalent version of Dale's Cone could be…

Obituary: Richard L. (Dick) Walker, Jr., 1938-2005

Science.gov (United States)

Pier, Jeffrey R.; Mason, Brian

2005-12-01

Dick Walker, 67, died 30 March 2005 in Flagstaff, AZ, following a long illness. He was born on 9 March 1938 in Hampton, Iowa and grew up in Waterloo, Iowa. As a child, Dick was fascinated with astronomy and built his own telescope. He saved his pennies and bought and read every book on the subject he could find. He also raised pigeons, naming four of them Hertzsprung, Hoyle, Gamow, and Kron. In 1957, the year Sputnik was launched, Dick began his college studies at the University of Northern Iowa in Cedar Falls. In 1959, he transferred to the State University of Iowa (subsequently renamed the University of Iowa) in Iowa City, where he earned a BA degree in astronomy and physics in 1963. He joined the staff of the U.S. Naval Observatory in Washington, DC, where he worked in the Time Service Division for a year before his assignment to the Astrometry and Astrophysics Division. Dick relocated to Flagstaff, AZ, in 1966 to continue his Naval Observatory service at the Flagstaff Station. His retirement in May 1999, ended a thirty-six-year career with USNO. Dick was first and foremost an observational astronomer. From the mid 1960s through the late 1970s, much of Dick's time was devoted to the measurement of binary stars, observing with the 12-inch and 26-inch refractors in Washington and later the 40-inch and 61-inch reflectors in Flagstaff. He also made many trips to Lick Observatory to work with the 36-inch Clark Refractor there. During this time he consulted with Charles Worley, who was observing on the 26-inch, to make sure time was well-spent examining doubles that could not be observed in Washington. This period of observing overlapped with the early years of speckle interferometry, and Dick's observations, made with the largest telescope used for micrometry at the time, were very important for ascertaining the veracity of this new technique. He was a studious and very careful observer of doubles and made over 8,000 measures, resulting in almost 3,000 mean positions

Astronaut Dale Gardner rehearses during EVA practice

Science.gov (United States)

1984-01-01

Astronaut Dale A. Gardner, 51-A mission specialist, rehearses control of manned maneuvering unit (MMU) during a practice for an extravehicular activity (EVA). Gardner is in the Shuttle mockup and integration laboratory at JSC. Gardner handles a stinger device to make initial contact with one of the two satellites they will be working with.

Overview of the Moby Dick project

NARCIS (Netherlands)

Smit, Gerardus Johannes Maria; Havinga, Paul J.M.; Mullender, Sape J.; Helme, A.; Hartvigsen, Gunnar; Fallmyr, Terje; Stabell-Kulo, Tage; Bartoli, Alberto; Dini, Gianluca; Rizzo, Luigi; Avvenuti, Marco; Seppanen, T.

The Moby Dick project focuses on developing theories, architectures and applications for a new generation of hand-held computers. The combination of an intelligent information system and a location system enables many new types of applications, such as admission control, digital chequebook, paging,

Dicke-model simulation via cavity-assisted Raman transitions

Science.gov (United States)

Zhang, Zhiqiang; Lee, Chern Hui; Kumar, Ravi; Arnold, K. J.; Masson, Stuart J.; Grimsmo, A. L.; Parkins, A. S.; Barrett, M. D.

2018-04-01

The Dicke model is of fundamental importance in quantum mechanics for understanding the collective behavior of atoms coupled to a single electromagnetic mode. Here, we demonstrate a Dicke-model simulation via cavity-assisted Raman transitions in a configuration using counterpropagating laser beams. The observations indicate that motional effects should be included to fully account for the results. These results are contrary to experiments using single-beam and copropagating configurations. We give a theoretical description that accounts for the beam geometries used in the experiments and indicates the potential role of motional effects. In particular, a model is given that highlights the influence of Doppler broadening on the observed phase-transition thresholds.

Holographic dark energy in Brans-Dicke cosmology with chameleon scalar field

Energy Technology Data Exchange (ETDEWEB)

Setare, M.R., E-mail: rezakord@ipm.i [Department of Science of Bijar, University of Kurdistan, Bijar (Iran, Islamic Republic of); Jamil, Mubasher, E-mail: mjamil@camp.edu.p [Center for Advanced Mathematics and Physics, National University of Sciences and Technology, Rawalpindi 46000 (Pakistan)

2010-06-07

We study a cosmological implication of holographic dark energy in the Brans-Dicke gravity. We employ the holographic model of dark energy to obtain the equation of state for the holographic energy density in non-flat (closed) universe enclosed by the event horizon measured from the sphere of horizon named L. Our analysis shows that one can obtain the phantom crossing scenario if the model parameter {alpha} (of order unity) is tuned accordingly. Moreover, this behavior is achieved by treating the Brans-Dicke scalar field as a Chameleon scalar field and taking a non-minimal coupling of the scalar field with matter. Hence one can generate phantom-like equation of state from a holographic dark energy model in non-flat universe in the Brans-Dicke cosmology framework.

Holographic dark energy in Brans-Dicke cosmology with chameleon scalar field

International Nuclear Information System (INIS)

Setare, M.R.; Jamil, Mubasher

2010-01-01

We study a cosmological implication of holographic dark energy in the Brans-Dicke gravity. We employ the holographic model of dark energy to obtain the equation of state for the holographic energy density in non-flat (closed) universe enclosed by the event horizon measured from the sphere of horizon named L. Our analysis shows that one can obtain the phantom crossing scenario if the model parameter α (of order unity) is tuned accordingly. Moreover, this behavior is achieved by treating the Brans-Dicke scalar field as a Chameleon scalar field and taking a non-minimal coupling of the scalar field with matter. Hence one can generate phantom-like equation of state from a holographic dark energy model in non-flat universe in the Brans-Dicke cosmology framework.

Evolution of the Brans—Dicke Parameter in Generalized Chameleon Cosmology

International Nuclear Information System (INIS)

Jamil, Mubasher; Momeni, D.

2011-01-01

Motivated by an earlier study of Sahoo and Singh [Mod. Phys. Lett. A 17 (2002) 2409], we investigate the time dependence of the Brans-Dicke parameter ω(t) for an expanding Universe in the generalized Brans-Dicke Chameleon cosmology, and obtain an explicit dependence of ω(t) in different expansion phases of the Universe. Also, we discuss how the observed accelerated expansion of the observable Universe can be accommodated in the present formalism. (geophysics, astronomy, and astrophysics)

Quantum tunneling in the adiabatic Dicke model

International Nuclear Information System (INIS)

Chen Gang; Chen Zidong; Liang Jiuqing

2007-01-01

The Dicke model describes N two-level atoms interacting with a single-mode bosonic field and exhibits a second-order phase transition from the normal to the superradiant phase. The energy levels are not degenerate in the normal phase but have degeneracy in the superradiant phase, where quantum tunneling occurs. By means of the Born-Oppenheimer approximation and the instanton method in quantum field theory, the tunneling splitting, inversely proportional to the tunneling rate for the adiabatic Dicke model, in the superradiant phase can be evaluated explicitly. It is shown that the tunneling splitting vanishes as exp(-N) for large N, whereas for small N it disappears as √(N)/exp(N). The dependence of the tunneling splitting on the relevant parameters, especially on the atom-field coupling strength, is also discussed

Experimental violation of the local realism for four-qubit Dicke state.

Science.gov (United States)

Zhao, Yuan-Yuan; Wu, Yu-Chun; Xiang, Guo-Yong; Li, Chuan-Feng; Guo, Guang-Can

2015-11-16

Dicke state is an widely used type of multi-particle entangled state in quantum information. However, very few works have been done on its nonlocality. Here we prepare a four-photon symmetric Dicke state, whose fidelity is as high as 0.904 ± 0.004, and devise a simple Bell-type inequality to demonstrate that it violates the local realism with 12 standard deviation.

Inflation and dark energy from the Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Artymowski, Michał [Institute of Physics, Jagiellonian UniversityŁojasiewicza 11, 30-348 Kraków (Poland); Lalak, Zygmunt; Lewicki, Marek [Institute of Theoretical Physics, Faculty of Physics, University of Warsawul. Pasteura 5, 02-093 Warszawa (Poland)

2015-06-17

We consider the Brans-Dicke theory motivated by the f(R)=R+αR{sup n}−βR{sup 2−n} model to obtain a stable minimum of the Einstein frame scalar potential of the Brans-Dicke field. As a result we have obtained an inflationary scalar potential with non-zero value of residual vacuum energy, which may be a source of dark energy. In addition we discuss the probability of quantum tunnelling from the minimum of the potential. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of n and ω.

Antigravity in F( R) and Brans-Dicke theories

Science.gov (United States)

Oikonomou, V. K.; Karagiannakis, N.

2014-12-01

We study antigravity in F( R)-theory originating scalar-tensor theories and also in Brans-Dicke models without cosmological constant. For the F( R) theory case, we obtain the Jordan frame antigravity scalar-tensor theory by using a variant of the Lagrange multipliers method and we numerically study the time dependent effective gravitational constant. As we shall demonstrate in detail by using some viable F( R) models, although the initial F( R) models have no antigravity, their scalar-tensor counterpart theories might or not have antigravity, a fact mainly depending on the parameter that characterizes antigravity. Similar results hold true in the Brans-Dicke model, which we also studied numerically. In addition, regarding the Brans-Dicke model we also found some analytic cosmological solutions. Since antigravity is an unwanted feature in gravitational theories, our findings suggest that in the case of F( R) theories, antigravity does not occur in the real world described by the F( R) theory, but might occur in the Jordan frame scalar-tensor counterpart of the F( R) theory, and this happens under certain circumstances. The central goal of our study is to present all different cases in which antigravity might occur in modified gravity models.

Astronaut Dale Gardner rehearses control of MMU during EVA practice

Science.gov (United States)

1984-01-01

Astronaut Dale A. Gardner, 51-A mission specialist, rehearses control of manned maneuvering unit (MMU) during a practice for an extravehicular activity (EVA). Gardner is in the Shuttle mockup and integration laboratory at JSC.

Unified dark fluid in Brans-Dicke theory

International Nuclear Information System (INIS)

Tripathy, Sunil K.; Behera, Dipanjali; Mishra, Bivudutta

2015-01-01

Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self-interacting potential. A unified dark fluid characterised by a linear equation of state is considered as the source of dark energy. The shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. The dynamics of the universe in the presence of a unified dark fluid in anisotropic background have been discussed. The presence of an evolving scalar field makes it possible to get an accelerating phase of expansion even for a linear relationship among the directional Hubble rates. It is found that the anisotropy in expansion rates does not affect the scalar field, the self-interacting potential, but it controls the non-evolving part of the Brans-Dicke parameter. (orig.)

Robert H Dicke – Physicist Extraordinaire

Indian Academy of Sciences (India)

Dicke started his college education at the University of Rochester intending to major in engineering. He credits Lee A ... War rumblings were growing louder and Professor DuBridge had left to establish the Radiation ... After the war, he returned to the Department of Physics at Princeton University. He spent the next decade ...

Interacting holographic dark energy in Brans-Dicke theory

International Nuclear Information System (INIS)

Sheykhi, Ahmad

2009-01-01

We study cosmological application of interacting holographic energy density in the framework of Brans-Dicke cosmology. We obtain the equation of state and the deceleration parameter of the holographic dark energy in a non-flat universe. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as L=ar(t). We find that the combination of Brans-Dicke field and holographic dark energy can accommodate w D =-1 crossing for the equation of state of noninteracting holographic dark energy. When an interaction between dark energy and dark matter is taken into account, the transition of w D to phantom regime can be more easily accounted for than when resort to the Einstein field equations is made.

Remembering Dick Crane

Science.gov (United States)

Jossem, E. Leonard

2007-09-01

Physicist, polymath, educator, leader, Horace Richard Crane died on April 19, 2007, a few months short of his 100th birthday. Those of us who were fortunate enough to have had him as a friend mourn his loss, but for all of us he leaves a rich and varied legacy of published works that invite reading and rereading. Dick's work as a physicist was recognized in 1966 by his election to the National Academy of Sciences and in 1986 by the award of the President's National Medal of Science: "For the first measurement of the magnetic moment and spin of free electrons and positrons."

Inflation and dark energy from the Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Artymowski, Michał [Institute of Physics, Jagiellonian University Łojasiewicza 11, 30-348 Kraków (Poland); Lalak, Zygmunt; Lewicki, Marek, E-mail: Michal.Artymowski@uj.edu.pl, E-mail: Zygmunt.Lalak@fuw.edu.pl, E-mail: Marek.Lewicki@fuw.edu.pl [Institute of Theoretical Physics, Faculty of Physics, University of Warsaw ul. Pasteura 5, 02-093 Warszawa (Poland)

2015-06-01

We consider the Brans-Dicke theory motivated by the f(R) = R + α R{sup n} − β R{sup 2−n} model to obtain a stable minimum of the Einstein frame scalar potential of the Brans-Dicke field. As a result we have obtained an inflationary scalar potential with non-zero value of residual vacuum energy, which may be a source of dark energy. In addition we discuss the probability of quantum tunnelling from the minimum of the potential. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of n and ω.

Effect of accretion on primordial black holes in Brans-Dicke theory

International Nuclear Information System (INIS)

Nayak, B.; Singh, L. P.; Majumdar, A. S.

2009-01-01

We consider the effect of accretion of radiation in the early Universe on primordial black holes in Brans-Dicke theory. The rate of growth of a primordial black hole due to accretion of radiation in Brans-Dicke theory is considerably smaller than the rate of growth of the cosmological horizon, thus making available sufficient radiation density for the black hole to accrete causally. We show that accretion of radiation by Brans-Dicke black holes overrides the effect of Hawking evaporation during the radiation dominated era. The subsequent evaporation of the black holes in later eras is further modified due to the variable gravitational 'constant', and they could survive up to longer times compared to the case of standard cosmology. We estimate the impact of accretion on modification of the constraint on their initial mass fraction obtained from the γ-ray background limit from presently evaporating primordial black holes.

New Brans-Dicke wormholes

International Nuclear Information System (INIS)

He Feng; Kim, Sung-Won

2002-01-01

Two new classes of exact solutions in vacuum Brans-Dicke theory are obtained, each of which is a two-way traversable wormhole for the coupling parameter ω<-2 or -2<ω≤0, respectively. Each of the two new classes of exact solutions satisfies not only the general constraints given by Morris and Thorne [Am. J. Phys. 56, 395 (1988)], as concluded earlier, but also the constraints from a trip through a wormhole. It also follows that the scalar field φ plays the role of exotic matter violating the weak energy condition

Change Strategies Used by a Proprietary School: The Dale Carnegie Organization.

Science.gov (United States)

Mackey, Paul J.

1983-01-01

Discusses recent developments regarding proprietary schools: recognition by accrediting associations, increased federal aid, and increased need for the specific training offered by these schools. Uses the Dale Carnegie organization as an example. (JOW)

Dale Chihuly: An Inspiration in Art, Science, and Math!

Science.gov (United States)

Hubbert, Beth

2009-01-01

Connecting students to the arts in a concrete way can be an effective teaching tool. In this article, the author describes how Dale Chihuly's "Hart Window," which features hand-blown glass disks affixed to the framework of the window, can be an inspiration for interdisciplinary connections in art, science and math. (Contains 4 online resources.)

Dicke superradiance as nondestructive probe for the state of atoms in optical lattices

Science.gov (United States)

ten Brinke, Nicolai; Schützhold, Ralf

2016-04-01

We present a proposal for a probing scheme utilizing Dicke superradiance to obtain information about ultracold atoms in optical lattices. A probe photon is absorbed collectively by an ensemble of lattice atoms generating a Dicke state. The lattice dynamics (e.g., tunneling) affects the coherence properties of that Dicke state and thus alters the superradiant emission characteristics - which in turn provides insight into the lattice (dynamics). Comparing the Bose-Hubbard and the Fermi-Hubbard model, we find similar superradiance in the strongly interacting Mott insulator regime, but crucial differences in the weakly interacting (superfluid or metallic) phase. Furthermore, we study the possibility to detect whether a quantum phase transition between the two regimes can be considered adiabatic or a quantum quench.

γ parameter and Solar System constraint in chameleon-Brans-Dicke theory

International Nuclear Information System (INIS)

Saaidi, Kh.; Mohammadi, A.; Sheikhahmadi, H.

2011-01-01

The post Newtonian parameter is considered in the chameleon-Brans-Dicke model. In the first step, the general form of this parameter and also effective gravitational constant is obtained. An arbitrary function for f(Φ), which indicates the coupling between matter and scalar field, is introduced to investigate validity of solar system constraint. It is shown that the chameleon-Brans-Dicke model can satisfy the solar system constraint and gives us an ω parameter of order 10 4 , which is in comparable to the constraint which has been indicated in [19].

Aesthetics at the Impasse: The Unresolved Property of Dale Farm

Science.gov (United States)

McCarthy, Lynne

2015-01-01

"Soil Depositions" was an art activist project that responded to the 2011 Irish Traveller eviction at Dale Farm in Essex when three resident women donated small amounts of soil from the site of their former home. The soil was subsequently deposited, framed and documented in various national and international locations. This article…

Mucocele fronto-ethmoïdale geante avec extension intracranienne ...

African Journals Online (AJOL)

Mucocele fronto-ethmoïdale geante avec extension intracranienne: a propos d'un cas et revue de la litterature. A Kabre, DS Zabsonre, Y Haro. Abstract. Les mucocèles sont des pseudotumeurs kystiques développées aux dépens des sinus paranasaux. D'évolution lente et silencieuse elles se révèlent le plus souvent par ...

Astronaut Dale Gardner holds up for sale sign after EVA

Science.gov (United States)

1984-01-01

Astronaut Dale A. Gardner, having just completed the major portion of his second extravehicular activity (EVA) period in three days, holds up a 'for sale' sign. Astronaut Joseph P. ALlen IV, who also participated in the two EVA's, is reflected in Gardner's helmet visor. A portion of each of two recovered satellites is in the lower right corner, with Westar nearer Discovery's aft.

Non-static local string in Brans–Dicke theory

Indian Academy of Sciences (India)

Abstract. A recent investigation showed that a local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin, is inconsistent in Brans–Dicke theory. In this work it has been shown that such a string is indeed consistent if one introduces time dependences in the metric. A set of solutions of full ...

Higher dimensional global monopole in Brans–Dicke theory

Indian Academy of Sciences (India)

Keywords. Global monopole; Brans–Dicke theory; higher dimension. PACS Nos 04.20.Jb; 98.80.Bp; 04.50.+h. 1. Introduction. The idea of higher dimensional theory was originated in super string and super gravity the- ories to unify gravity with other fundamental forces in nature. Solutions of Einstein field equations in higher ...

A Quintessence Problem in Self-interacting Brans-Dicke Theory

OpenAIRE

Chakraborty, Subenoy; Chakraborty, N. C.; Debnath, Ujjal

2003-01-01

A quintessence scalar field in self-interacting Brans-Dicke theory is shown to give rise to a non-decelerated expansion of the present universe for open, flat and closed models. Along with providing a non-decelerating solution, it can potentially solve the flatness problem too.

Astronaut Dale Gardner using MMU to travel to Westar VI satellite

Science.gov (United States)

1984-01-01

Astronaut Dale A. Gardner, wearing the manned maneuvering unit (MMU) approaching the spinng Westar VI satellite over Bahama Banks. Gardner uses a large tool called the apogee kick motor capture device (ACD) to enter the nozzle of the spent Westar engine and stabilize the satellite to capture it for return to Earth.

Astronat Dale Gardner using MMU to travel to Westar VI satellite

Science.gov (United States)

1984-01-01

Astronat Dale A. Gardner appears to be under the remote manipulator system (RMS) end effector as he makes a turn in space and preapares to use the manned maneuvering unit (MMU) to travel to Westar VI satellite. The 'stinger' he carries will enter the communications satellite through the nozzle of the spent motor.

Interview with Marcel Dicke: the Droste effect in science

NARCIS (Netherlands)

Dicke, M.

2015-01-01

Marcel Dicke grew up at the outskirts of Rotterdam, The Netherlands. He enjoyed strolling through the meadows and jumping over ditches to observe animals and plants. He was interested in life in general and his interest in biology, and especially ecology, was aroused by his inspiring high school

Possible observational manifestations of wormholes in the Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Alexeyev, S. O., E-mail: alexeyev@sai.msu.ru; Rannu, K. A., E-mail: rannu@xray.sai.msu.ru [Sternberg Astronomical Institute (Russian Federation); Gareeva, D. V., E-mail: 4elesta@mail.ru [Moscow State University (Russian Federation)

2011-10-15

The energy flux emitted during the accretion of matter onto a wormhole in the Brans-Dicke theory has been calculated. This characteristic is compared with its values calculated previously for wormholes in general relativity and for a Schwarzschild black hole.

Minimizing energy consumption for wireless computers in Moby Dick

NARCIS (Netherlands)

Havinga, Paul J.M.; Smit, Gerardus Johannes Maria

1997-01-01

The Moby Dick project is a joint European project to develop and define the architecture of a new generation of mobile hand-held computers, called Pocket Companions. The Pocket Companion is a hand-held device that is resource-poor, i.e. small amount of memory, limited battery life, low processing

Brans-Dicke Theory with Λ>0: Black Holes and Large Scale Structures.

Science.gov (United States)

Bhattacharya, Sourav; Dialektopoulos, Konstantinos F; Romano, Antonio Enea; Tomaras, Theodore N

2015-10-30

A step-by-step approach is followed to study cosmic structures in the context of Brans-Dicke theory with positive cosmological constant Λ and parameter ω. First, it is shown that regular stationary black-hole solutions not only have constant Brans-Dicke field ϕ, but can exist only for ω=∞, which forces the theory to coincide with the general relativity. Generalizations of the theory in order to evade this black-hole no-hair theorem are presented. It is also shown that in the absence of a stationary cosmological event horizon in the asymptotic region, a stationary black-hole horizon can support a nontrivial Brans-Dicke hair. Even more importantly, it is shown next that the presence of a stationary cosmological event horizon rules out any regular stationary solution, appropriate for the description of a star. Thus, to describe a star one has to assume that there is no such stationary horizon in the faraway asymptotic region. Under this implicit assumption generic spherical cosmic structures are studied perturbatively and it is shown that only for ω>0 or ω≲-5 their predicted maximum sizes are consistent with observations. We also point out how, many of the conclusions of this work differ qualitatively from the Λ=0 spacetimes.

Transactions en eaux troubles : résurgences de la voix shakespearienne dans Moby-Dick Defamiliarising the Bard: The Resurgence of Shakespeare in Moby-Dick

Directory of Open Access Journals (Sweden)

Ronan Ludot-Vlasak

2009-06-01

Full Text Available This article explores the way Herman Melville appropriates William Shakespeare’s work in Moby-Dick. Its argument is that by defamiliarising some of Shakespeare’s lines—a corpus that was both alien and familiar to nineteenth-century writers— Melville turns them into his own idiom. This resurgence of the Shakespearean voice is double: although the dramatic element in the novel is often associated with the figure of Ahab, Ishmael also incorporates Shakespearean lines into his narrative. What characterises these (intertextual transactions is that instead of quoting directly from Shakespeare’s plays, Melville often blurs references in order to appropriate the works of his predecessor. More than the mere imitation of a model, this complex process reveals Shakespeare’s seminal role in Moby-Dick as well as Melville’s poetics of reinvention. Ultimately, it enables the author to explore the dark forces lying beneath the surface of things.

Brans-Dicke theory in general space-time with torsion

International Nuclear Information System (INIS)

Kim, S.

1986-01-01

The Brans-Dicke theory in the general space-time endowed with torsion is investigated. Since the gradient of the scalar field as well as the intrinsic spin generate the torsion field, the interaction term of the spin-scalar field appears in the wave equation. The equations of motion are satisfied with the conservation laws

Dicke coherent narrowing in two-photon and Raman spectroscopy of thin vapor cells

International Nuclear Information System (INIS)

Dutier, Gabriel; Todorov, Petko; Hamdi, Ismahene; Maurin, Isabelle; Saltiel, Solomon; Bloch, Daniel; Ducloy, Martial

2005-01-01

The principle of coherent Dicke narrowing in a thin vapor cell, in which sub-Doppler spectral line shapes are observed under a normal irradiation for a λ/2 thickness, is generalized to two-photon spectroscopy. Only the sum of the two wave vectors must be normal to the cell, making the two-photon scheme highly versatile. A comparison is provided between the Dicke narrowing with copropagating fields, and the residual Doppler broadening occurring with counterpropagating geometries. The experimental feasibility is discussed on the basis of a first observation of a two-photon resonance in a 300-nm-thick Cs cell. Extension to the Raman situation is finally considered

The Mythical Retention Chart and the Corruption of Dale's Cone of Experience

Science.gov (United States)

Subramony, Deepak Prem; Molenda, Michael; Betrus, Anthony K.; Thalheimer, Will

2014-01-01

In response to the wide-scale proliferation of "the cone of learning"--a fanciful retention chart confounded with Dale's Cone of Experience--the authors make four major claims debunking this fantasy and provide documentary evidence to support these claims. The first claim is that the data in the mythical retention chart do not make…

Previous Attempts to Debunk the Mythical Retention Chart and Corrupted Dale's Cone

Science.gov (United States)

Subramony, Deepak Prem; Molenda, Michael; Betrus, Anthony K.; Thalheimer, Will

2014-01-01

Critics have been attempting to debunk the mythical retention chart at least since 1971. The earliest critics, David Curl and Frank Dwyer, were addressing just the retention data. Beginning around 2002, a new generation of critics has taken on the illegitimate combination of the retention chart and Edgar Dale's Cone of Experience--the corrupted…

Brans-Dicke inflation in light of the Planck 2015 data

International Nuclear Information System (INIS)

Tahmasebzadeh, B.; Rezazadeh, K.; Karami, K.

2016-01-01

We study inflation in the Brans-Dicke gravity as a special model of the scalar-tensor gravity. We obtain the inflationary observables containing the scalar spectral index, the tensor-to-scalar ratio, the running of the scalar spectral index and the equilateral non-Gaussianity parameter in terms of the general form of the potential in the Jordan frame. Then, we compare the results for various inflationary potentials in light of the Planck 2015 data. Our study shows that in the Brans-Dicke gravity, the power-law, inverse power-law and exponential potentials are ruled out by the Planck 2015 data. But, the hilltop, Higgs, Coleman-Weinberg and natural potentials can be compatible with Planck 2015 TT,TE,EE+lowP data at 95% CL. Moreover, the D-brane, SB SUSY and displaced quadratic potentials can be in well agreement with the observational data since their results can lie inside the 68% CL region of Planck 2015 TT,TE,EE+lowP data.

Brans-Dicke inflation in light of the Planck 2015 data

Energy Technology Data Exchange (ETDEWEB)

Tahmasebzadeh, B. [Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), P.O. Box 45195-1159, Zanjan (Iran, Islamic Republic of); Rezazadeh, K.; Karami, K., E-mail: b.tahmasebzadeh@iasbs.ac.ir, E-mail: rezazadeh86@gmail.com, E-mail: kkarami@uok.ac.ir [Department of Physics, University of Kurdistan, Pasdaran St., P.O. Box 66177-15175, Sanandaj (Iran, Islamic Republic of)

2016-07-01

We study inflation in the Brans-Dicke gravity as a special model of the scalar-tensor gravity. We obtain the inflationary observables containing the scalar spectral index, the tensor-to-scalar ratio, the running of the scalar spectral index and the equilateral non-Gaussianity parameter in terms of the general form of the potential in the Jordan frame. Then, we compare the results for various inflationary potentials in light of the Planck 2015 data. Our study shows that in the Brans-Dicke gravity, the power-law, inverse power-law and exponential potentials are ruled out by the Planck 2015 data. But, the hilltop, Higgs, Coleman-Weinberg and natural potentials can be compatible with Planck 2015 TT,TE,EE+lowP data at 95% CL. Moreover, the D-brane, SB SUSY and displaced quadratic potentials can be in well agreement with the observational data since their results can lie inside the 68% CL region of Planck 2015 TT,TE,EE+lowP data.

Effect of a Brans--Dicke cosmology upon stellar evolution and the evolution of galaxies

International Nuclear Information System (INIS)

Prather, M.J.

1976-01-01

The effect which a variable G cosmology, such as Brans-Dicke, will have on the evolution of individual stars and of galaxies composed of these stars is examined in the hope that present day observation of globular clusters or giant elliptical galaxies will provide a test for the Brans--Dicke theory. The higher value of the gravitational coupling coefficient G in the past history of various Brans--Dicke universes is studied in detail. A low density, open universe is selected for study: fractional closure density = 0.2, present Hubble constant = km/s/Mpc, stellar formation at a red-shift of 5, and the Brans--Dicke parameter omega = 6. In this universe a set of stellar evolutionary tracks is computed from the Zero-Age Main Sequence through the Giant Branch to the Horizontal Branch for approximately solar composition, (Y,Z) = (0.25, 0.02). When compared at equivalent evolutionary phases, the luminosity of individual stars is found to increase greatly with G from the ZAMS to the HB. The higher G greatly speeds up the evolutionary time scale for the main sequence, and it decreases the core mass at the helium flash, leaving the luminosity of the tip of the GB and the HB unchanged. The net effect of a higher G on a cluster of stars is to increase the apparent mass at the turn-off and to reduce the lifetimes of all the evolutionary phases from the ZAMS to the HB by the same factor. Thus, the relative number density of stars in the major phases of stellar evolution is unchanged

Gladstone-Dale constant for CF4. [experimental design

Science.gov (United States)

Burner, A. W., Jr.; Goad, W. K.

1980-01-01

The Gladstone-Dale constant, which relates the refractive index to density, was measured for CF4 by counting fringes of a two-beam interferometer, one beam of which passes through a cell containing the test gas. The experimental approach and sources of systematic and imprecision errors are discussed. The constant for CF4 was measured at several wavelengths in the visible region of the spectrum. A value of 0.122 cu cm/g with an uncertainty of plus or minus 0.001 cu cm/g was determined for use in the visible region. A procedure for noting the departure of the gas density from the ideal-gas law is discussed.

Dewey, Dale, and Bruner: Educational Philosophy, Experiential Learning, and Library School Cataloging Instruction.

Science.gov (United States)

Garrett, LeAnn

1997-01-01

Discusses educational philosophies of John Dewey, Edgar Dale, and Jerome Bruner dealing with experience and learning and describes experiential learning activities within the curriculum of the School of Library and Information Studies at the University of Hawaii. Results of a study examining student attitudes toward experiential learning are…

Nudging van rijsnelheid via Dick Brunaborden : een veldexperiment : de effecten op werkelijk gereden snelheden in vijf gemeenten onderzocht. In opdracht van Metropoolregio Rotterdam Den Haag.

NARCIS (Netherlands)

Goldenbeld, C. Groot-Mesken, J. de & Temürhan, M.

2017-01-01

Nudging driving speed using Dick Bruna traffic signs: a field experiment; Study of the actual speeds driven in five municipalities in the Netherlands. This report presents the results of a study into the effect of Dick Bruna (Dick Bruna is a Dutch author, illustrator and graphic designer known for

Äripäev : Hiiumaa edukaim ettevõte on Dale LD AS / Urmas Lauri

Index Scriptorium Estoniae

Lauri, Urmas, 1956-

2006-01-01

Hiiumaa ettevõtete pingereas esimeseks tõusnud Dale LD AS-i tegevjuhi Tiit Asumetsa sõnul andis suurt efekti firma käibesse ja kasumisse Soome firmaga Ensto OY sõlmitud koostööleping. Lisa: Hiiumaa ettevõtete TOP aastal 2005

On the action of the complete Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Kofinas, Georgios [University of the Aegean, Research Group of Geometry, Dynamical Systems and Cosmology, Department of Information and Communication Systems Engineering, Karlovassi, Samos (Greece); Tsoukalas, Minas [Bogazici University, Physics Department, Istanbul (Turkey); National Technical University of Athens, Physics Division, Athens (Greece)

2016-12-15

Recently the most general completion of Brans-Dicke theory has appeared with energy exchanged between the scalar field and ordinary matter, given that the equation of motion for the scalar field keeps the simple wave form of Brans-Dicke. This class of theories contain undetermined functions, but there exist only three theories which are unambiguously determined from consistency. Here, for the first such theory, the action of the vacuum theory is found, which arises as the limit of the full matter theory. A symmetry transformation of this vacuum action in the Jordan frame is found which consists of a conformal transformation of the metric together with a redefinition of the scalar field. Since the general family of vacuum theories is parametrized by an arbitrary function of the scalar field, the action of this family is also found. As for the full theory with matter the action of the system is only found when the matter Lagrangian vanishes on-shell, as for example for pressureless dust. Due to the interaction, the matter Lagrangian is non-minimally coupled either in the Jordan or the Einstein frame. (orig.)

On the action of the complete Brans-Dicke theory

International Nuclear Information System (INIS)

Kofinas, Georgios; Tsoukalas, Minas

2016-01-01

Recently the most general completion of Brans-Dicke theory has appeared with energy exchanged between the scalar field and ordinary matter, given that the equation of motion for the scalar field keeps the simple wave form of Brans-Dicke. This class of theories contain undetermined functions, but there exist only three theories which are unambiguously determined from consistency. Here, for the first such theory, the action of the vacuum theory is found, which arises as the limit of the full matter theory. A symmetry transformation of this vacuum action in the Jordan frame is found which consists of a conformal transformation of the metric together with a redefinition of the scalar field. Since the general family of vacuum theories is parametrized by an arbitrary function of the scalar field, the action of this family is also found. As for the full theory with matter the action of the system is only found when the matter Lagrangian vanishes on-shell, as for example for pressureless dust. Due to the interaction, the matter Lagrangian is non-minimally coupled either in the Jordan or the Einstein frame. (orig.)

The cosmological term and a modified Brans-Dicke cosmology

International Nuclear Information System (INIS)

Endo, M.; Fukui, T.

1977-01-01

Adding the cosmological term Λ, which is assumed to be variable in this paper, to the Brans-Dicke Lagrangian, an attempt is made to understand the meaning of the term and to relate it to the mass of the universe. The Dirac large-number hypothesis is considered, applying the results obtained from the application of the present theory to a uniform cosmological model. (author)

First-Order Quantum Phase Transition for Dicke Model Induced by Atom-Atom Interaction

International Nuclear Information System (INIS)

Zhao Xiu-Qin; Liu Ni; Liang Jiu-Qing

2017-01-01

In this article, we use the spin coherent state transformation and the ground state variational method to theoretically calculate the ground function. In order to consider the influence of the atom-atom interaction on the extended Dicke model’s ground state properties, the mean photon number, the scaled atomic population and the average ground energy are displayed. Using the self-consistent field theory to solve the atom-atom interaction, we discover the system undergoes a first-order quantum phase transition from the normal phase to the superradiant phase, but a famous Dicke-type second-order quantum phase transition without the atom-atom interaction. Meanwhile, the atom-atom interaction makes the phase transition point shift to the lower atom-photon collective coupling strength. (paper)

Negotiating Transcendentalism, Escaping « Paradise » : Herman Melville’s Moby-Dick.

Directory of Open Access Journals (Sweden)

Ramón Espejo Romero

2010-06-01

Full Text Available By reviewing the critical literature on Melville and Transcendentalism and then undertaking a close reading of Moby-Dick (1851, this paper argues that the novel reflects, among other things, an ongoing debate between the novelist and Transcendentalist philosophy. While in later works, Melville seems to express a more robust condemnation of the Concord movement and its dangerous idealism, Moby-Dick occupies less firmly-defined territory. The Transcendentalist urge of an Ahab to be himself is a counterpoint to Ishmael’s more idiosyncratic deployment of self-reliance, communion with the oversoul, and various other concepts easy to trace back to Emerson or Thoreau. The conclusion seems to be that a negotiation is necessary if Transcendentalism is to be heeded at all, precisely the kind of negotiation Ishmael undertakes throughout the novel, one which spares him from the maelstrom created by a more radical approach to self-acceptance and self-fashioning.

Spectroscopy of Atomic Vapors in Nanometer Cells: Dicke Narrowing and Beyond

International Nuclear Information System (INIS)

Vartanyan, T A; Khromov, V V

2012-01-01

Sub-Doppler spectroscopy of gaseous media confined in thin pillbox-shaped cells was pioneered by R.H. Dicke. In the past, this idea attracted much less attention compared to 'Dicke narrowing' in buffer gas where the atoms or molecules perform a diffusive motion instead of being bounced back and forth between the walls of the cell in a completely predetermined nature. The situation is going to be changed as atomic spectroscopy becoming an essential part of mobile devices for civil and military applications that require tiny spectroscopic cells. In the pillbox shaped cells, the role of the fast moving atoms is diminished, while the slowly moving atoms contribute most to the absorption as well as to the fluorescence. The role of the slowly moving atoms and their transient polarization in selective reflection spectroscopy was highlighted by J.L. Cojan. By merging these two approaches we have developed a theoretical description of optical reflection from and transmission through the narrow slice of atomic vapours.

Parameterized post-Newtonian coefficients for Brans-Dicke gravity with d + 1 dimensions

Energy Technology Data Exchange (ETDEWEB)

Klimek, Matthew D, E-mail: klimek@physics.rutgers.ed [Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States)

2009-03-21

We present calculations of post-Newtonian parameters for Brans-Dicke tensor-scalar gravity in an arbitrary number of compact extra dimensions in both the Jordan and Einstein conformal frames. We find that the parameter gamma, which measures the amount of spacetime curvature per unit mass, becomes a function of omega, the coefficient of the scalar kinetic term in the Brans-Dicke Lagrangian. Experiment has placed strong constraints on gamma which require that omega becomes negative in the Jordan frame for any number of extra dimensions, highlighting that this formulation is not physical. We also confirm the well-known result that a compact extra dimension can be equivalently viewed as a massless scalar 'dilaton.' In the Einstein frame, we find that the behavior of gamma as constrained by experiment replicates that which is predicted by string theory.

Charles Dick: Agricultural Regulation in Santa Cruz, 1930- 1967

OpenAIRE

Regional History Project, UCSC Library; Dick, Charles; Jarrell, Randall

1997-01-01

This is the oral history of the late county agricultural commissioner, who traces the history of California's unique system of agricultural regulation and inspection, which dates from the 1880s. Dick's overview of county agriculture includes the increasing importance of pesticide regulation (which is currently a very debated issue in the strawberry industry); mechanization, changes in local crops and acreages, farm labor and unionization, and the demise of the family farm.

Optimized entanglement witnesses for Dicke states

Energy Technology Data Exchange (ETDEWEB)

Bergmann, Marcel; Guehne, Otfried [Naturwissenschaftlich-Technische Fakultaet, Universitaet Siegen, Department Physik, Walter-Flex-Strasse 3, D-57068 Siegen (Germany)

2013-07-01

Quantum entanglement is an important resource for applications in quantum information processing like quantum teleportation and cryptography. Moreover, the number of particles that can be entangled experimentally using polarized photons or ion traps has been significantly enlarged. Therefore, criteria to decide the question whether a given multi-particle state is entangled or not have to be improved. Our approach to this problem uses the notion of PPT mixtures which form an approximation to the set of bi-separable states. With this method, entanglement witnesses can be obtained in a natural manner via linear semi-definite programming. In our contribution, we will present analytical results for entanglement witnesses for Dicke states. This allows to overcome the limitations of convex optimization.

Einstein metrics and Brans-Dicke superfields

International Nuclear Information System (INIS)

Marques, S.

1988-01-01

It is obtained here a space conformal to the Einstein space-time, making the transition from an internal bosonic space, constructed with the Majorana constant spinors in the Majorana representation, to a bosonic ''superspace,'' through the use of Einstein vierbeins. These spaces are related to a Grassmann space constructed with the Majorana spinors referred to above, where the ''metric'' is a function of internal bosonic coordinates. The conformal function is a scale factor in the zone of gravitational radiation. A conformal function dependent on space-time coordinates can be constructed in that region when we introduce Majorana spinors which are functions of those coordinates. With this we obtain a scalar field of Brans-Dicke type. 11 refs

An extended geometric criterion for chaos in the Dicke model

International Nuclear Information System (INIS)

Li Jiangdan; Zhang Suying

2010-01-01

We extend HBLSL's (Horwitz, Ben Zion, Lewkowicz, Schiffer and Levitan) new Riemannian geometric criterion for chaotic motion to Hamiltonian systems of weak coupling of potential and momenta by defining the 'mean unstable ratio'. We discuss the Dicke model of an unstable Hamiltonian system in detail and show that our results are in good agreement with that of the computation of Lyapunov characteristic exponents.

Straight spinning cosmic strings in Brans-Dicke gravity

Science.gov (United States)

Dos Santos, S. Mittmann; da Silva, J. M. Hoff; Cindra, J. L.

2018-03-01

An exact solution of straight spinning cosmic strings in Brans-Dicke theory of gravitation is presented. The possibility of the existence of closed time-like curves around these cosmic strings is analyzed. Furthermore, the stability about the formation of the topological defect discussed here is checked. It is shown that the existence of a suitable choice for the integration constants in which closed time-like curves are not allowed. We also study the (im)possibility of using the obtained spacetime in the rotational curves problem.

Plane symmetric cosmological model with thick domain walls in Brans-Dicke theory of gravitation

International Nuclear Information System (INIS)

Pawar, D.; Bayaskar, S.; Patil, V.

2009-01-01

We have investigated plane symmetric cosmological model in presence of thick domain walls in Brans-Dicke theory of gravitation, some geometrical and physical behavior of the model are discussed. (authors)

A unique finding of a great helm from the Dalečín Castle in Moravia

Czech Academy of Sciences Publication Activity Database

Cisár, V.; Hošek, Jiří; Žákovský, P.

2012-01-01

Roč. 8, prosinec (2012), s. 91-125 ISSN 1895-4103 R&D Projects: GA ČR GAP405/12/2289 Institutional support: RVO:67985912 Keywords : great helm * Dalečín * metallographic examination Subject RIV: AC - Archeology, Anthropology, Ethnology

Qualitative analysis of cosmological models in Brans-Dicke theory, solutions from non-minimal coupling and viscous universe

International Nuclear Information System (INIS)

Romero Filho, C.A.

1988-01-01

Using dynamical system theory we investigate homogeneous and isotropic models in Brans-Dicke theory for perfect fluids with general equation of state and arbitrary ω. Phase diagrams are drawn on the Poincare sphere which permits a qualitative analysis of the models. Based on this analysis we construct a method for generating classes of solutions in Brans-Dicke theory. The same technique is used for studying models arising from non-minimal coupling of electromagnetism with gravity. In addition, viscous fluids are considered and non-singular solutions with bulk viscosity are found. (author)

Louis Dick (1921 - 2014)

CERN Multimedia

2014-01-01

Louis Dick, a CERN experimental physicist of international renown, passed away on 14 July.   Louis in his office, a veritable archaeological wonder with strata of documents corresponding to various eras of physics. Born in Geneva on 27 April 1921, Louis obtained a physics degree at ETH-Zurich in 1946 before moving to the Institut du Radium in Paris, where he joined the group led by Frédéric and Irène Joliot-Curie. He took a leave of absence in 1957 to go to CERN, where he remained until well beyond his retirement in 1986. In the late 1950s and early 1960s, Louis worked at CERN’s Synchrocyclotron (SC) and later on studies at the Proton Synchrotron (PS). When the first polarised proton target arrived at CERN from Saclay in 1963, Louis proposed using it for studies of spin effects in pion-proton elastic scattering at the PS, and between 1964 and 1966 sizeable spin effects were found. Louis and his collaborators then continued these studies wi...

Gödel and Gödel-type universes in Brans–Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Agudelo, J.A., E-mail: jaar@fisica.ufmt.br [Instituto de Física, Universidade Federal de Mato Grosso, 78060-900, Cuiabá, Mato Grosso (Brazil); Nascimento, J.R., E-mail: jroberto@fisica.ufpb.br [Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970, João Pessoa, Paraíba (Brazil); Petrov, A.Yu., E-mail: petrov@fisica.ufpb.br [Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970, João Pessoa, Paraíba (Brazil); Porfírio, P.J., E-mail: pporfirio@fisica.ufpb.br [Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970, João Pessoa, Paraíba (Brazil); Santos, A.F., E-mail: alesandroferreira@fisica.ufmt.br [Instituto de Física, Universidade Federal de Mato Grosso, 78060-900, Cuiabá, Mato Grosso (Brazil); Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road Victoria, BC (Canada)

2016-11-10

In this paper, conditions for existence of Gödel and Gödel-type solutions in Brans–Dicke (BD) scalar–tensor theory and their main features are studied. The consistency of equations of motion, causality violation and existence of CTCs (closed time-like curves) are investigated. The role which cosmological constant and Mach principle play to achieve the consistency of this model is studied.

Decrease of concentrations after 2000 is mainly the result of economic recessions; Daling van concentraties deze eeuw vooral het gevolg van recessies

Energy Technology Data Exchange (ETDEWEB)

Cats, G.

2011-08-15

The decrease in background concentrations of particulate matter after 2000 is mainly caused by three years of strong decrease, two of which coincided with decreased economic growth. Recessions are an effective source measure and may be necessary for timely compliance with the European standards. [Dutch] De daling in de achtergrondconcentraties van fijn stof na 2000 blijkt vooral terug te voeren tot drie jaren met sterke daling, waarvan er twee samenvielen met verminderde economische groei. Recessies zijn effectief als bronmaatregel en zijn misschien noodzakelijk om tijdig aan de Europese normen te kunnen voldoen.

'Dale': an interpretative phenomenological analysis of a service user's experience with a crisis resolution/home treatment team in the United Kingdom.

Science.gov (United States)

Nelson, L J; Miller, P K; Ashman, D

2016-08-01

WHAT IS KNOWN ABOUT THE SUBJECT?: This paper describes crisis resolution/home treatment (CRHT) teams, which are part of mental health services in the United Kingdom. CRHT is expected to assist individuals in building resilience and work within a recovery approach. WHAT THIS PAPER ADDS TO EXISTING KNOWLEDGE?: This paper arises from an interview with one individual, Dale, as part of a larger study exploring service users' experiences of CRHT. It adds to the body of narrative knowledge in CRHT through Dale's co-authorship of this paper, reflecting on his original interview 4 years later, with co-authors providing critical interpretation of his experience, in turn supported by cognate literature. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: Implications for practice are considered, themselves mediated through Dale's own descriptions of how CRHT interventions impacted upon him. These impacts are analysed with respect to three themes: Resilience, Recovery and Power. It is centrally contended that clinicians need to more clearly comprehend three core matters. First, what resilience 'is' for service users as well as the complex process through which these individuals move in developing resilience. Second, the distinction that service users might make between 'recovery' and 'functionality', and how this in turn can impact on individuals both in personal and socioeconomic sense. Finally, the mechanics of power within CRHT contexts and how these interpersonal dynamics can affect the relationship between service user and clinician in practice. Introduction and Aim The central purpose of this paper, part of a larger study exploring the experiences of Service Users (SUs) with CRHT, is to emphasise the importance of the SU voice itself within the domain. Following an interrogation of the historical contexts of CRHT. Method This paper uses interpretative phenomological approach around detailed thematic examination of an extended, semi-structured with a single SU: Dale. Moreover, four

Generation of Symmetric Dicke States of Remote Qubits with Linear Optics

International Nuclear Information System (INIS)

Thiel, C.; Zanthier, J. von; Bastin, T.; Solano, E.; Agarwal, G. S.

2007-01-01

We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear optical tools only. By means of a suitable multiphoton detection technique, erasing Welcher-Weg information, our proposed scheme allows the generation and measurement of an important class of entangled multiqubit states

New holographic reconstruction of scalar-field dark-energy models in the framework of chameleon Brans-Dicke cosmology

International Nuclear Information System (INIS)

Chattopadhyay, Surajit; Pasqua, Antonio; Khurshudyan, Martiros

2014-01-01

Motivated by the work of Yang et al. (Mod. Phys. Lett. A 26:191, 2011), we report on a study of the new holographic dark energy (NHDE) model with energy density given by ρ D = (3φ 2 )/(4ω)(μH 2 + νH) in the framework of chameleon Brans-Dicke cosmology. We have studied the correspondence between the quintessence, the DBI-essence, and the tachyon scalar-field models with the NHDE model in the framework of chameleon Brans-Dicke cosmology. Deriving an expression of the Hubble parameter H and, accordingly, ρ D in the context of chameleon Brans-Dicke chameleon cosmology, we have reconstructed the potentials and dynamics for these scalar-field models. Furthermore, we have examined the stability for the obtained solutions of the crossing of the phantom divide under a quantum correction of massless conformally invariant fields, and we have seen that the quantum correction could be small when the phantom crossing occurs and the obtained solutions of the phantom crossing could be stable under the quantum correction. It has also been noted that the potential increases as the matter. chameleon coupling gets stronger with the evolution of the universe. (orig.)

New holographic reconstruction of scalar-field dark-energy models in the framework of chameleon Brans-Dicke cosmology

Energy Technology Data Exchange (ETDEWEB)

Chattopadhyay, Surajit [Pailan College of Management and Technology, Kolkata (India); Pasqua, Antonio [University of Trieste, Department of Physics, Trieste (Italy); Khurshudyan, Martiros [Yerevan State University, Department of Theoretical Physics, Yerevan (Armenia); Potsdam-Golm Science Park, Max Planck Institute of Colloids and Interfaces, Potsdam (Germany)

2014-09-15

Motivated by the work of Yang et al. (Mod. Phys. Lett. A 26:191, 2011), we report on a study of the new holographic dark energy (NHDE) model with energy density given by ρ{sub D} = (3φ{sup 2})/(4ω)(μH{sup 2} + νH) in the framework of chameleon Brans-Dicke cosmology. We have studied the correspondence between the quintessence, the DBI-essence, and the tachyon scalar-field models with the NHDE model in the framework of chameleon Brans-Dicke cosmology. Deriving an expression of the Hubble parameter H and, accordingly, ρ{sub D} in the context of chameleon Brans-Dicke chameleon cosmology, we have reconstructed the potentials and dynamics for these scalar-field models. Furthermore, we have examined the stability for the obtained solutions of the crossing of the phantom divide under a quantum correction of massless conformally invariant fields, and we have seen that the quantum correction could be small when the phantom crossing occurs and the obtained solutions of the phantom crossing could be stable under the quantum correction. It has also been noted that the potential increases as the matter. chameleon coupling gets stronger with the evolution of the universe. (orig.)

Naked singularity formation in Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Ziaie, Amir Hadi; Atazadeh, Khedmat [Department of Physics, Shahid Beheshti University, Evin, Tehran 19839 (Iran, Islamic Republic of); Tavakoli, Yaser, E-mail: am.ziaie@mail.sbu.ac.i, E-mail: k-atazadeh@sbu.ac.i, E-mail: tavakoli@ubi.p [Departamento de Fisica, Universidade da Beira Interior, Rua Marques d' Avila e Bolama, 6200 Covilha (Portugal)

2010-04-07

Gravitational collapse of the Brans-Dicke scalar field with non-zero potential in the presence of matter fluid obeying the barotropic equation of state, p = wrho, is studied. Utilizing the concept of the expansion parameter, it is seen that the cosmic censorship conjecture may be violated for w=-1/3 and w=-2/3 which correspond to the cosmic string and domain wall, respectively. We have shown that physically, it is the rate of collapse that governs the formation of a black hole or a naked singularity as the final fate of dynamical evolution and only for these two cases can the singularity be naked as the collapse end state. Also the weak energy condition is satisfied by the collapsing configuration.

Stability analysis and observational measurement in chameleonic generalised Brans-Dicke cosmology

International Nuclear Information System (INIS)

Farajollahi, Hossein; Salehi, Amin

2011-01-01

We investigate the dynamics of the chameleonic Generalised Brans-Dicke model in flat FRW cosmology. In a new approach, a framework to study stability and attractor solutions in the phase space for the model is developed by simultaneously best fitting the stability and model parameters with the observational data. The results show that for an accelerating universe the phantom crossing does not occur in the past and near future

Cosmological constraints on Brans-Dicke theory.

Science.gov (United States)

Avilez, A; Skordis, C

2014-07-04

We report strong cosmological constraints on the Brans-Dicke (BD) theory of gravity using cosmic microwave background data from Planck. We consider two types of models. First, the initial condition of the scalar field is fixed to give the same effective gravitational strength Geff today as the one measured on Earth, GN. In this case, the BD parameter ω is constrained to ω>692 at the 99% confidence level, an order of magnitude improvement over previous constraints. In the second type, the initial condition for the scalar is a free parameter leading to a somewhat stronger constraint of ω>890, while Geff is constrained to 0.981theory and are valid for any Horndeski theory, the most general second-order scalar-tensor theory, which approximates the BD theory on cosmological scales. In this sense, our constraints place strong limits on possible modifications of gravity that might explain cosmic acceleration.

Interaction of Gravitational field and Brans-Dicke field in R/W universe containing Dark Energy like fluid

International Nuclear Information System (INIS)

Singh, Kangujam Priyokumar; Dewri, Mukunda; Singh, Koijam Manihar

2016-01-01

On studying some new models of Robertson-Walker universes with a Brans-Dicke scalar field, it is found that most of these universes contain a dark energy like fluid which confirms the present scenario of the expansion of the universe. In one of the cases, the exact solution of the field equations gives a universe with a false vacuum, while in another it reduces to that of dust distribution in the Brans-Dicke cosmology when the cosmological constant is not in the picture. In one particular model it is found that the universe may undergo a Big Rip in the future, and thus it will be very interesting to investigate such models further. (paper)

Test af to versioner af Modflow-LGR til simulering af grundvandsstrømninger i områder med begravede dale – syntetisk studie

DEFF Research Database (Denmark)

Vilhelmsen, Troels Norvin; Christensen, Steen

.eks. findes i begravede dale. Manglende opløsning af geologiske aflejringer på lokal skala kan potentielt resultere i fejlagtige prædiktioner af konsekvensen af grundvandsindvinding på kildeplads niveau. For i højere grad at kunne forvalte disse grundvandsressourcerne skal nye metoder undersøges. Dette er...... specielt gældende for komplekse begravede dalsystemer, som interagerer med omkringliggende regionale grundvandsystemer. I dette syntetiske studie er to versioner af MODFLOW - Local Grid Refinment (LGR) testet til simulering af grundvandsstrømninger i områder med begravede dale. Forsøgene er gennemført som...

Exact scaling solutions in normal and Brans-Dicke models of dark energy

International Nuclear Information System (INIS)

Arias, Olga; Gonzalez, Tame; Leyva, Yoelsy; Quiros, Israel

2003-01-01

A linear relationship between the Hubble expansion parameter and the time derivative of the scalar field is explored in order to derive exact cosmological, attractor-like solutions, both in Einstein's theory and in Brans-Dicke gravity with two fluids: a background fluid of ordinary matter and a self-interacting scalar-field fluid accounting for the dark energy in the universe. A priori assumptions about the functional form of the self-interaction potential or about the scale factor behaviour are not necessary. These are obtained as outputs of the assumed relationship between the Hubble parameter and the time derivative of the scalar field. A parametric class of scaling quintessence models given by a self-interaction potential of a peculiar form, a combination of exponentials with dependence on the barotropic index of the background fluid, arises. Both normal quintessence described by a self-interacting scalar field minimally coupled to gravity and Brans-Dicke quintessence given by a non-minimally coupled scalar field are then analysed and the relevance of these models for the description of the cosmic evolution is discussed in some detail. The stability of these solutions is also briefly commented on

Stellar explosion in the weak field approximation of the Brans-Dicke theory

International Nuclear Information System (INIS)

Hamity, Victor H; Barraco, Daniel E

2005-01-01

We treat a very crude model of an exploding star, in the weak field approximation of the Brans-Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one magnitude from that maximum. This characteristic has become one of the most accurate methods to measure luminosity distances to objects at cosmological distances (Phillips M M 1993 Astrophys. J. 413 L105; see www.all-science-fair-projects.com/ science f air p rojects e ncyclopedia/Supernova, for a brief description of supernovae types). An interesting result is that the active mass associated with the scalar field is totally radiated to infinity, representing a mass loss in the ratio of the 'tensor' component to the scalar component of 1 to (2ω + 3) (ω is the Brans-Dicke parameter), in agreement with a general result of Hawking (1972 Commun. Math. Phys. 25 167). Then, this model shows explicitly, in a dynamical case, the mechanism of the radiation of a scalar field, which is necessary to understand the Hawking result

Inflationary phase in Brans-Dicke cosmology with a cosmological constant

Science.gov (United States)

Berman, Marcelo Samuel

1989-12-01

It has been shown earlier that, for a perfect fluid, a perfect gas law of state, and the Robertson-Walker metric, an exponential phase in Brans-Dicke cosmology is possible, with both positive pressure and density, but not with the violated energy condition p = -ρ. We demonstrate in this paper that the inclusion of a cosmological constant into the theory does not change that picture. Permanent address: Departamento de Ciencias Exatas da Faculdade de Filosofia, Ceincias e Letras da FURJ, Joinville, SC 89200, Brazil.

Anisotropic string cosmological model in Brans–Dicke theory of gravitation with time-dependent deceleration parameter

Energy Technology Data Exchange (ETDEWEB)

Maurya, D. Ch., E-mail: dcmaurya563@gmail.com; Zia, R., E-mail: rashidzya@gmail.com; Pradhan, A., E-mail: pradhan.anirudh@gmail.com [GLA University, Department of Mathematics, Institute of Applied Sciences and Humanities (India)

2016-10-15

We discuss a spatially homogeneous and anisotropic string cosmological models in the Brans–Dicke theory of gravitation. For a spatially homogeneous metric, it is assumed that the expansion scalar θ is proportional to the shear scalar σ. This condition leads to A = kB{sup m}, where k and m are constants. With these assumptions and also assuming a variable scale factor a = a(t), we find solutions of the Brans–Dicke field equations. Various phenomena like the Big Bang, expanding universe, and shift from anisotropy to isotropy are observed in the model. It can also be seen that in early stage of the evolution of the universe, strings dominate over particles, whereas the universe is dominated by massive strings at the late time. Some physical and geometrical behaviors of the models are also discussed and observed to be in good agreement with the recent observations of SNe la supernovae.

Exact solution for the inhomogeneous Dicke model in the canonical ensemble: Thermodynamical limit and finite-size corrections

Energy Technology Data Exchange (ETDEWEB)

Pogosov, W.V., E-mail: walter.pogosov@gmail.com [N.L. Dukhov All-Russia Research Institute of Automatics, Moscow (Russian Federation); Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Dolgoprudny (Russian Federation); Shapiro, D.S. [N.L. Dukhov All-Russia Research Institute of Automatics, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Dolgoprudny (Russian Federation); V.A. Kotel' nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow (Russian Federation); National University of Science and Technology MISIS, Moscow (Russian Federation); Bork, L.V. [N.L. Dukhov All-Russia Research Institute of Automatics, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Onishchenko, A.I. [Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna (Russian Federation); Moscow Institute of Physics and Technology, Dolgoprudny (Russian Federation); Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow (Russian Federation)

2017-06-15

We consider an exactly solvable inhomogeneous Dicke model which describes an interaction between a disordered ensemble of two-level systems with single mode boson field. The existing method for evaluation of Richardson–Gaudin equations in the thermodynamical limit is extended to the case of Bethe equations in Dicke model. Using this extension, we present expressions both for the ground state and lowest excited states energies as well as leading-order finite-size corrections to these quantities for an arbitrary distribution of individual spin energies. We then evaluate these quantities for an equally-spaced distribution (constant density of states). In particular, we study evolution of the spectral gap and other related quantities. We also reveal regions on the phase diagram, where finite-size corrections are of particular importance.

Attractors, statefinders and observational measurement for chameleonic Brans-Dicke cosmology

Energy Technology Data Exchange (ETDEWEB)

Farajollahi, Hossein; Salehi, Amin, E-mail: hosseinf@guilan.ac.ir, E-mail: a.salehi@guilan.ac.ir [Department of Physics, University of Guilan, Rasht (Iran, Islamic Republic of)

2010-11-01

We investigate chameleonic Brans-Dicke model applied to the FRW universes. A framework to study stability and attractor solutions in the phase space is developed for the model. We show that depending on the matter field and stability conditions, it is possible to realize phantom-like behavior without introducing phantom filed in the model while the stability is fulfilled and phantom crossing occurs. The statefinder parameters to the model for different kinds of matter interacting with the chameleon scalar field are studied. We also compare our model with present day observations.

Attractors, statefinders and observational measurement for chameleonic Brans-Dicke cosmology

International Nuclear Information System (INIS)

Farajollahi, Hossein; Salehi, Amin

2010-01-01

We investigate chameleonic Brans-Dicke model applied to the FRW universes. A framework to study stability and attractor solutions in the phase space is developed for the model. We show that depending on the matter field and stability conditions, it is possible to realize phantom-like behavior without introducing phantom filed in the model while the stability is fulfilled and phantom crossing occurs. The statefinder parameters to the model for different kinds of matter interacting with the chameleon scalar field are studied. We also compare our model with present day observations

Distribution of uranium in two sulphide ore environments from the reversed metamorphic sequence of the Daling Rocks in the Dargeeling-Sikkim Himalaya, India

International Nuclear Information System (INIS)

Ghosh, A.K.

1988-01-01

In the low-grade Daling metasediments of Gorubathan, the average U content of 3-4 ppm reflects the original U content of the unmetamorphosed sediments. The high-grade metasediments of Dichu averag 6 ppm, and the sulphide ores of this area also have more U compared to Gorubathan ores.This higher U content in the high-grade rocks and in the associated ores is believed to be the result of enrichment during metasomatic activity in the area. Neverthelessthe fact that the Daling metasediments have higher U contents thanthat of the sulphide ores appears to be independent of the grade of metamorphism in the progressive sequence

Ground water in Dale Valley, New York

Science.gov (United States)

Randall, Allan D.

1979-01-01

Dale Valley is a broad valley segment, enlarged by glacial erosion, at the headwaters of Little Tonawanda Creek near Warsaw , New York. A thin, shallow alluvial aquifer immediately underlies the valley floor but is little used. A deeper gravel aquifer, buried beneath many feet of lake deposits, is tapped by several industrial wells. A finite-difference digital model treated the deep aquifer as two-dimensional with recharge and discharge through a confining layer. It was calibrated by simulating (1) natural conditions, (2) an 18-day aquifer test, and (3) 91 days of well-field operation. Streamflow records and model simulations suggest that in moderately wet years such as 1974, a demand of 750 gallons per minute could be met by withdrawal from the creek and from the aquifer without excessive drawdown at production wells or existing domestic wells. With reasonable but unverified model adjustments to simulate an unusually dry year, the model predicts that a demand of 600 gallons per minute could be met from the same sources. Water high in chloride has migrated from bedrock into parts of the deep aquifer. Industrial pumpage, faults in the bedrock, and the natural flow system may be responsible. (Woodard-USGS)

Interacting HDE and NADE in Brans-Dicke chameleon cosmology

Energy Technology Data Exchange (ETDEWEB)

Sheykhi, Ahmad, E-mail: sheykhi@mail.uk.ac.i [Department of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Jamil, Mubasher, E-mail: mjamil@camp.nust.edu.p [Center for Advanced Mathematics and Physics, National University of Sciences and Technology, H-12, Islamabad (Pakistan)

2011-01-03

Motivated by the recent work of one of us Setare and Jamil (2010) , we generalize this work to the case where the pressureless dark matter and the holographic dark energy do not conserve separately but interact with each other. We investigate the cosmological applications of interacting holographic dark energy in Brans-Dicke theory with chameleon scalar field which is non-minimally coupled to the matter field. We find out that in this model the phantom crossing can be constructed if the model parameters are chosen suitably. We also perform the study for the new agegraphic dark energy model and calculate some relevant cosmological parameters and their evolution.

Thermodynamics in modified Brans-Dicke gravity with entropy corrections

Energy Technology Data Exchange (ETDEWEB)

Rani, Shamaila; Jawad, Abdul; Nawaz, Tanzeela [COMSATS Institute of Information Technology, Department of Mathematics, Lahore (Pakistan); Manzoor, Rubab [University of Management and Technology, Department of Mathematics, Lahore (Pakistan)

2018-01-15

In this paper, we investigate the thermodynamics in the frame-work of recently proposed theory called modified Brans-Dicke gravity (Kofinas et al. in Class Quantum Gravity 33:15, 2016). For this purpose, we develop the generalized second law of thermodynamics by assuming usual entropy as well as its corrected forms (logarithmic and power law corrected) on the apparent and event horizons. In order to analyzed the clear view of thermodynamic law, the power law forms of scalar field and scale factor is being assumed. We evaluate the results graphically and found that generalized second law of thermodynamics holds in most of the cases. (orig.)

Interacting HDE and NADE in Brans-Dicke chameleon cosmology

International Nuclear Information System (INIS)

Sheykhi, Ahmad; Jamil, Mubasher

2011-01-01

Motivated by the recent work of one of us Setare and Jamil (2010) , we generalize this work to the case where the pressureless dark matter and the holographic dark energy do not conserve separately but interact with each other. We investigate the cosmological applications of interacting holographic dark energy in Brans-Dicke theory with chameleon scalar field which is non-minimally coupled to the matter field. We find out that in this model the phantom crossing can be constructed if the model parameters are chosen suitably. We also perform the study for the new agegraphic dark energy model and calculate some relevant cosmological parameters and their evolution.

Thermodynamics in modified Brans-Dicke gravity with entropy corrections

International Nuclear Information System (INIS)

Rani, Shamaila; Jawad, Abdul; Nawaz, Tanzeela; Manzoor, Rubab

2018-01-01

In this paper, we investigate the thermodynamics in the frame-work of recently proposed theory called modified Brans-Dicke gravity (Kofinas et al. in Class Quantum Gravity 33:15, 2016). For this purpose, we develop the generalized second law of thermodynamics by assuming usual entropy as well as its corrected forms (logarithmic and power law corrected) on the apparent and event horizons. In order to analyzed the clear view of thermodynamic law, the power law forms of scalar field and scale factor is being assumed. We evaluate the results graphically and found that generalized second law of thermodynamics holds in most of the cases. (orig.)

Holographic Dark Energy in Brans-Dicke Theory with Logarithmic Form of Scalar Field

Science.gov (United States)

Singh, C. P.; Kumar, Pankaj

2017-10-01

In this paper, an interacting holographic dark energy model with Hubble horizon as an infra-red cut-off is considered in the framework of Brans-Dicke theory. We assume the Brans-Dicke scalar field as a logarithmic form ϕ = ϕ 0 l n( α + β a), where a is the scale factor, α and β are arbitrary constants, to interpret the physical phenomena of the Universe. The equation of state parameter w h and deceleration parameter q are obtained to discuss the dynamics of the evolution of the Universe. We present a unified model of holographic dark energy which explains the early time acceleration (inflation), medieval time deceleration and late time acceleration. It is also observed that w h may cross the phantom divide line in the late time evolution. We also discuss the cosmic coincidence problem. We obtain a time-varying density ratio of holographic dark energy to dark matter which is a constant of order one (r˜ O(1)) during early and late time evolution, and may evolve sufficiently slow at present time. Thus, the model successfully resolves the cosmic coincidence problem.

Explaining fast radio bursts through Dicke's superradiance

Science.gov (United States)

Houde, Martin; Mathews, Abhilash; Rajabi, Fereshteh

2018-03-01

Fast radio bursts (FRBs), characterized by strong bursts of radiation intensity at radio wavelengths lasting on the order of a millisecond, have yet to be firmly associated with a family, or families, of astronomical sources. It follows that despite the large number of proposed models, no well-defined physical process has been identified to explain this phenomenon. In this paper, we demonstrate how Dicke's superradiance, for which evidence has recently been found in the interstellar medium, can account for the characteristics associated with FRBs. Our analysis and modelling of previously detected FRBs suggest they could originate from regions in many ways similar to those known to harbour masers or megamasers, and result from the coherent radiation emanating from populations of molecules associated with large-scale entangled quantum mechanical states. We estimate this entanglement to involve as many as ˜1030 to ˜1032 molecules over distances spanning 100-1000 au.

Robert Dicke and the naissance of experimental gravity physics, 1957-1967

Science.gov (United States)

Peebles, Phillip James Edwin

2017-06-01

The experimental study of gravity became much more active in the late 1950s, a change pronounced enough be termed the birth, or naissance, of experimental gravity physics. I present a review of developments in this subject since 1915, through the broad range of new approaches that commenced in the late 1950s, and up to the transition of experimental gravity physics to what might be termed a normal and accepted part of physical science in the late 1960s. This review shows the importance of advances in technology, here as in all branches of natural science. The role of contingency is illustrated by Robert Dicke's decision in the mid-1950s to change directions in mid-career, to lead a research group dedicated to the experimental study of gravity. The review also shows the power of nonempirical evidence. Some in the 1950s felt that general relativity theory is so logically sound as to be scarcely worth the testing. But Dicke and others argued that a poorly tested theory is only that, and that other nonempirical arguments, based on Mach's Principle and Dirac's Large Numbers hypothesis, suggested it would be worth looking for a better theory of gravity. I conclude by offering lessons from this history, some peculiar to the study of gravity physics during the naissance, some of more general relevance. The central lesson, which is familiar but not always well advertised, is that physical theories can be empirically established, sometimes with surprising results.

Cylindrically symmetric, static strings with a cosmological constant in Brans-Dicke theory

International Nuclear Information System (INIS)

Delice, Oezguer

2006-01-01

The static cylindrically symmetric vacuum solutions with a cosmological constant in the framework of the Brans-Dicke theory are investigated. Some of these solutions admitting Lorentz boost invariance along the symmetry axis correspond to local, straight cosmic strings with a cosmological constant. Some physical properties of such solutions are studied. These strings apply attractive or repulsive forces on the test particles. A smooth matching is also performed with a recently introduced interior thick string solution with a cosmological constant

Application of the functional integration method to the Dicke-type models

International Nuclear Information System (INIS)

Popov, V.N.; Fedotov, S.A.

1981-01-01

The asymptotics of the statistical model sum of the Dicke-type (Z/Z 6 ) is obtained and strictly proved at large N (N is an atomic number; Z is a statistical model sum; Z 0 is a statistical free system sum) using the functional integration method. The model with one bose-field mode is considered. A detailed proof is carried out at T > Tsub(c). An idea of the proof is planned and asymptotic formulae are presented for T < Tsub(c) and in the vicinity of Tsub(c)

Isotropic LQC and LQC-inspired models with a massless scalar field as generalised Brans-Dicke theories

Science.gov (United States)

Rama, S. Kalyana

2018-06-01

We explore whether generalised Brans-Dicke theories, which have a scalar field Φ and a function ω (Φ ), can be the effective actions leading to the effective equations of motion of the LQC and the LQC-inspired models, which have a massless scalar field σ and a function f( m). We find that this is possible for isotropic cosmology. We relate the pairs (σ , f) and (Φ , ω ) and, using examples, illustrate these relations. We find that near the bounce of the LQC evolutions for which f(m) = sin m, the corresponding field Φ → 0 and the function ω (Φ ) ∝ Φ ^2. We also find that the class of generalised Brans-Dicke theories, which we had found earlier to lead to non singular isotropic evolutions, may be written as an LQC-inspired model. The relations found here in the isotropic cases do not apply to the anisotropic cases, which perhaps require more general effective actions.

O absurdo em «Caieira», de Ricardo Guilherme Dicke

Directory of Open Access Journals (Sweden)

Hilda Gomes Dutra Magalhães

2012-08-01

Full Text Available Resumo: Nosso objetivo neste artigo consiste em analisar o espaço do absurdo no romance Caieira, do escritor matogrossense Ricardo Guilherme Dicke. Como suporte teóricometodológico, utilizamos as ideias sobre o absurdo de Camus. Durante a análise, percebemos que o espaço em que se desenvolvem as ações narradas em Caieira representa uma relação de dominação, em que os personagens são reduzidas a fantasmas ou objetos, presas num mundo de cal, árido de humanidade. Mesmo quando o personagem principal tenta reverter o quadro, acaba se transformando num reverso da mesma moeda, repetindo o modelo de dominação contra o qual se insurge, reeditando um ciclo de poder e dominação. Palavras-chave: Literatura brasileira; análise literária; absurdo; espaço.Abstract: Our aim in this paper is to analyze the space of the absurd at the novel Caieira, by Ricardo Guilherme Dicke, writer from Mato Grosso. As a theoretical-methodological support, we use the ideas of on the absurd presented by Camus. During the analysis, we find that the space in which the actions narrated in Caieira develop represents a relationship of domination, in which the characters are reduced to objects or ghosts, trapped in a world of lime, arid of humanity. Even when the main character tries to reverse the situation, eventually becoming a reverse of the same coin, repeating the pattern of domination against which it protests, reissuing a cycle of power and domination. Keywords: Brazilian literature; literary analysis; absurd; space.

Cosmopolitanism and Our Descriptions of Ethics and Ontology: A Response to Dale Snauwaert's "The Ethics and Ontology of Cosmopolitanism"

Science.gov (United States)

Hansen, David T.

2010-01-01

In recent years scholars across the humanities and social sciences have revitalized the ancient concept of cosmopolitanism. Dale Snauwaert illuminates why this is so in his thoughtful article on what it might mean to educate for a shared humanity. Snauwaert shows why many people find so-called "realism" an unsatisfactory political and moral…

Evolution of Bianchi I magnetized cosmic strings in Brans–Dicke gravity

International Nuclear Information System (INIS)

Sharif, M; Waheed, Saira

2013-01-01

In this paper, we consider a locally rotationally symmetric Bianchi I universe filled with magnetized viscous string fluid in Brans–Dicke gravity. For the exact solutions, we use the law of variation of the Hubble parameter that leads to volumetric expansion laws and assume power law ansatz for the scalar field. We discuss the nature of the resulting models through different parameters and their graphs. It is concluded that the constructed universe models yield an accelerated expanding behavior with an isotropic nature for the final stages of the universe evolution, which is consistent with recent observations. (paper)

Notes on the post-Newtonian limit of the massive Brans-Dicke theory

International Nuclear Information System (INIS)

Roshan, Mahmood; Shojai, Fatimah

2011-01-01

We consider the post-Newtonian limit of the massive Brans-Dicke theory and make some notes about the post-Newtonian limit of the case ω = 0. This case is dynamically equivalent to the metric f(R) theory. It is known that this theory can be compatible with the solar system tests if the Chameleon mechanism occurs. Also, it is known that this mechanism is because of the nonlinearity in the field equations produced by the largeness of the local curvature relative to the background curvature. Thus, the linearization of the field equations breaks down. On the other hand, we know that the Chameleon mechanism exists when a coupling between the matter and the scalar field exists. In the Jordan frame of the Brans-Dicke theory, we have no such coupling. But in the Einstein frame, this theory behaves like a Chameleon scalar field. By confining ourselves to the case ω = 0, we show that 'Chameleon-like' behaviour can exist also in the Jordan frame, but it has an important difference compared with the Chameleon mechanism. Also we show that the conditions which lead to the existence of a 'Chameleon-like' mechanism are consistent with the conditions in the post-Newtonian limit which correspond to a heavy scalar field at the cosmological scale and a small effective cosmological constant. Thus, one can linearize field equations to the post-Newtonian order, and this linearization has no contradiction with the existence of 'Chameleon-like' behaviour.

Majumdar-Papapetrou class of nonstatic cylindrically symmetric Brans-Dicke-Maxwell fields

International Nuclear Information System (INIS)

Tiwari, R.N.; Rao, P.P.

1979-01-01

Relations have been obtained between certain components of the metric and the electromagnetic potentials for source-free Brans-Dicke-Maxwell fields described by a nonstatic cylindrically symmetric Einstein-Rosen metric. These are important, in the sense that they generate a class of solutions that in a way can be said to belong to the class generated by similar relations obtained by Majumdar (Phys. Rev.; 72: 390 (1947)) and Papapetrou (Proc. R. Ir. Acad. Sect. A.; 51: 191 (1947)) for generalized static Einstein-Maxwell fields. The relations have further been used to reduce the B-D Maxwell equations to B-D vacuum equations and vice versa. (author)

Time variation of the cosmological redshift in Dicke-Brans-Jordan cosmologies

International Nuclear Information System (INIS)

Ruediger, R.

1982-01-01

In this paper the time variation z of the cosmological redshift z is discussed for Dicke-Brans-Jordan (DBJ) cosmologies. We determine the general z-z relation in the functional form zH -1 0 = F(z; q 0 , sigma 0 ,xi 0 , ω) for small values of z, where all the symbols have their conventional meanings. For certain combinations of cosmological parameters, which are within the present observational limitations, the DBJ terms in the function F can dominate the general relativistic terms. Furthermore, zH -1 0 can be positive in DBJ cosmologies in contrast to general relativistic cosmologies with q 0 >0

Decoherence, entanglement, and chaos in the Dicke model

International Nuclear Information System (INIS)

Hou Xiwen; Hu Bambi

2004-01-01

The dynamical properties of quantum entanglement in the Dicke model without rotating-wave approximation are investigated in terms of the reduced-density linear entropy. The characteristic time of decoherence process in the early-time evolution is numerically obtained and it is shown that the characteristic time decreases as the coupling parameter increases. The mean entanglement, which is defined to be averaged over time, is employed to describe the influences of both quantum phase transition and corresponding classical chaos on the behavior of entanglement. For a given energy, initial conditions are taken to be minimum uncertainty wave packets centered at regular and chaotic regions of the classical phase space. It is shown that the entanglement has a distinct change at the quantum phase transition, and that the entanglement for regular initial conditions is smaller than that for chaotic ones in the case of weak coupling, while it fluctuates with small amplitude in strong coupling and for chaotic initial conditions

Stationary axially symmetric exterior solutions in the five-dimensional representation of the Brans-Dicke-Jordan theory of gravitation

International Nuclear Information System (INIS)

Bruckman, W.

1986-01-01

The inverse scattering method of Belinsky and Zakharov is used to investigate axially symmetric stationary vacuum soliton solutions in the five-dimensional representation of the Brans-Dicke-Jordan theory of gravitation, where the scalar field of the theory is an element of a five-dimensional metric. The resulting equations for the spacetime metric are similar to those of solitons in general relativity, while the scalar field generated is the product of a simple function of the coordinates and an already known scalar field solution. A family of solutions is considered that reduce, in the absence of rotation, to the five-dimensional form of a well-known Weyl-Levi Civita axially symmetric static vacuum solution. With a suitable choice of parameters, this static limit becomes equivalent to the spherically symmetric solution of the Brans-Dicke theory. An exact metric, in which the Kerr-scalar McIntosh solution is a special case, is given explicitly

Notes on the post-Newtonian limit of the massive Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Roshan, Mahmood; Shojai, Fatimah, E-mail: fshojai@ut.ac.ir [Department of Physics, University of Tehran, Tehran (Iran, Islamic Republic of)

2011-07-21

We consider the post-Newtonian limit of the massive Brans-Dicke theory and make some notes about the post-Newtonian limit of the case {omega} = 0. This case is dynamically equivalent to the metric f(R) theory. It is known that this theory can be compatible with the solar system tests if the Chameleon mechanism occurs. Also, it is known that this mechanism is because of the nonlinearity in the field equations produced by the largeness of the local curvature relative to the background curvature. Thus, the linearization of the field equations breaks down. On the other hand, we know that the Chameleon mechanism exists when a coupling between the matter and the scalar field exists. In the Jordan frame of the Brans-Dicke theory, we have no such coupling. But in the Einstein frame, this theory behaves like a Chameleon scalar field. By confining ourselves to the case {omega} = 0, we show that 'Chameleon-like' behaviour can exist also in the Jordan frame, but it has an important difference compared with the Chameleon mechanism. Also we show that the conditions which lead to the existence of a 'Chameleon-like' mechanism are consistent with the conditions in the post-Newtonian limit which correspond to a heavy scalar field at the cosmological scale and a small effective cosmological constant. Thus, one can linearize field equations to the post-Newtonian order, and this linearization has no contradiction with the existence of 'Chameleon-like' behaviour.

Fano and Dicke effects in a double Rashba-ring system

International Nuclear Information System (INIS)

Apel, V M; Orellana, P A; Pacheco, M

2008-01-01

The electronic transport in a system of two quantum rings side-coupled to a quantum wire is studied via a single-band tunneling tight-binding Hamiltonian. We derived analytical expressions for the conductance and spin polarization when the rings are threaded by magnetic fluxes with Rashba spin-orbit interaction. We show that by using the Fano and Dicke effects this system can be used as an efficient spin filter even for small spin-orbit interaction and small values of magnetic fluxes. We compare the spin-dependent polarization of this design and the polarization obtained with one ring side-coupled to a quantum ring. As a main result, we find better spin polarization capabilities as compared to the one-ring design

Public Speaking on the Streets and in the Ivory Tower: A Comparison of the Dale Carnegie Course and the Academic Course.

Science.gov (United States)

Miller, Christine M.

Many speech communication educators and researchers look upon Dale Carnegie's public speaking course with derision for its methods as well as its motives. A comparison of Carnegie's course with university courses in speech communication reveals a number of differences between the two, which in part explains this attitude. Carnegie began his course…

Extension of the Gladstone-Dale equation for flame flow field diagnosis by optical computerized tomography

International Nuclear Information System (INIS)

Chen Yunyun; Li Zhenhua; Song Yang; He Anzhi

2009-01-01

An extended model of the original Gladstone-Dale (G-D) equation is proposed for optical computerized tomography (OCT) diagnosis of flame flow fields. For the purpose of verifying the newly established model, propane combustion is used as a practical example for experiment, and moire deflection tomography is introduced with the probe wavelength 808 nm. The results indicate that the temperature based on the extended model is more accurate than that based on the original G-D equation. In a word, the extended model can be suitable for all kinds of flame flow fields whatever the components, temperature, and ionization are.

Elliptic solutions of generalized Brans-Dicke gravity with a non-universal coupling

Energy Technology Data Exchange (ETDEWEB)

Alimi, J.M.; Reverdy, V. [Observatoire de Paris, Laboratoire Univers et Theories (LUTh), Meudon (France); Golubtsova, A.A. [Observatoire de Paris, Laboratoire Univers et Theories (LUTh), Meudon (France); Peoples' Friendship University of Russia, Institute of Gravitation and Cosmology, Moscow (Russian Federation)

2014-10-15

We study a model of the generalized Brans-Dicke gravity presented in both the Jordan and in the Einstein frames, which are conformally related. We show that the scalar field equations in the Einstein frame are reduced to the geodesics equations on the target space of the nonlinear sigma model. The analytical solutions in elliptical functions are obtained when the conformal couplings are given by reciprocal exponential functions. The behavior of the scale factor in the Jordan frame is studied using numerical computations. For certain parameters the solutions can describe an accelerated expansion. We also derive an analytical approximation in exponential functions. (orig.)

Lacan leitor de Melanie Klein: O caso Dick em questão

OpenAIRE

Lucero, Ariana; Vorcaro, Angela Maria Resende

2017-01-01

RESUMO - O artigo apresenta a leitura que Jacques Lacan faz do caso Dick, de Melanie Klein. Para tanto, a discussão com o flósofo Jean Hyppolite é retomada com o objetivo de explicitarmos como os mecanismos de Ausstossung [expulsão], Verneinung [negação] e Bejahung [afrmação], descritos por Freud em 1925, podem contribuir para a compreensão da constituição psíquicasob uma perspectiva lacaniana. Em seguida, expomos o caso, tanto para apreendermos clinicamente o que foi exposto na teoria, quant...

An efficient single-step scheme for manipulating quantum information of two trapped ions beyond the Lamb-Dicke limit

International Nuclear Information System (INIS)

Wei, L.F.; Nori, Franco

2003-01-01

Based on the exact conditional quantum dynamics for a two-ion system, we propose an efficient single-step scheme for coherently manipulating quantum information of two trapped cold ions by using a pair of synchronous laser pulses. Neither the auxiliary atomic level nor the Lamb-Dicke approximation are needed

Implications of Two Well-Known Models for Instructional Designers in Distance Education: Dick-Carey versus Morrison-Ross-Kemp

Science.gov (United States)

Akbulut, Yavuz

2007-01-01

This paper first summarizes, and then compares and contrasts two well-known instructional design models: Dick and Carey Model (DC) and Morrison, Ross and Kemp model (MRK). The target audiences of both models are basically instructional designers. Both models have applications for different instructional design settings. They both see the…

On the limit of Brans-Dicke theory when omega -> infinity

CERN Document Server

Chauvineau, B

2003-01-01

We discuss the problem of the limit of the Brans-Dicke theory (BDT) in the limit omega -> infinity, when the trace of the stress tensor is not zero. It is shown that a BDT solution, with T not = 0, known in the framework of anisotropic cosmology, fails to converge to the general relativity theory (GRT) corresponding solution. Considering the spherically symmetric field problem, it is shown that the argument leading to the convergence in the static case is lost when the non-static case is considered. These remarks suggest that the non-convergence of BDT to GRT could be the general behaviour, even if T not = 0, except for some (most?) of the highly symmetric solutions, including most of the known ones. The impact on gravitational radiation detection is emphasized.

Johani ja Anna-Liisa vana valge / Agneta Land-Koskinen

Index Scriptorium Estoniae

Land-Koskinen, Agneta

2007-01-01

Renoveeritud vanas majas asuv korter, kus seinad on valged, mis on antiiksetele esemetele ja huvitavatele disainileidudele parimaks taustaks. Kultusobjektideks valgustid, nende hulgas ka Verner Pantoni ja Louis Poulseni loomingut

Dynamics of axial symmetric system in self-interacting Brans-Dicke gravity

International Nuclear Information System (INIS)

Sharif, M.; Manzoor, Rubab

2016-01-01

This paper investigates the dynamics of an axial reflection symmetric model in self-interacting Brans-Dicke gravity for anisotropic fluid. We formulate hydrodynamical equations and discuss oscillations using a time-dependent perturbation for both spin-dependent and spin-independent cases. The expressions of the frequency, the total energy density, and the equation of motion of the oscillating model are obtained. We study the instability of the oscillating models in weak approximations. It is found that the oscillations and stability of the model depend upon the dark energy source along with anisotropy and reflection effects. We conclude that the axial reflection system remains stable for stiffness parameter Γ = 1, collapses for Γ > 1, and becomes unstable for 0 < Γ < 1. (orig.)

Dynamics of axial symmetric system in self-interacting Brans-Dicke gravity

Energy Technology Data Exchange (ETDEWEB)

Sharif, M. [University of the Punjab, Department of Mathematics, Lahore (Pakistan); Manzoor, Rubab [University of Management and Technology, Department of Mathematics, Lahore (Pakistan)

2016-06-15

This paper investigates the dynamics of an axial reflection symmetric model in self-interacting Brans-Dicke gravity for anisotropic fluid. We formulate hydrodynamical equations and discuss oscillations using a time-dependent perturbation for both spin-dependent and spin-independent cases. The expressions of the frequency, the total energy density, and the equation of motion of the oscillating model are obtained. We study the instability of the oscillating models in weak approximations. It is found that the oscillations and stability of the model depend upon the dark energy source along with anisotropy and reflection effects. We conclude that the axial reflection system remains stable for stiffness parameter Γ = 1, collapses for Γ > 1, and becomes unstable for 0 < Γ < 1. (orig.)

Water physics and chemistry data from STD casts from THELMA DALE II and other platforms from 09 August 1954 to 05 March 1959 (NODC Accession 7101380)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Water physics and chemistry data were collected from STD casts from THELMA DALE II and other platforms from 09 August 1954 to 05 March 1959. Data were submitted by...

Resonances of the confined hydrogen atom and the Lamb-Dicke effect in non-relativistic qed

DEFF Research Database (Denmark)

Faupin, Jeremy

2008-01-01

We study a model describing a system of one dynamical nucleus and one electron confined by their center of mass and interacting with the quantized electromagnetic field. We impose an ultraviolet cutoff and assume that the fine-structure constant is sufficiently small. Using a renormalization grou...... method (based on [3, 4]), we prove that the unperturbed eigenvalues turn into resonances when the nucleus and the electron are coupled to the radiation field. This analysis is related to the Lamb–Dicke effect....

Implementation of Organizational Changes in Chinese Companies / Wei Sun, Ruth Alas

Index Scriptorium Estoniae

Sun, Wei

2007-01-01

Põhja-Hiina 160 ettevõttes läbi viidud uuringu alusel analüüsitakse organisatsioonilisi muutusi, nende mõju ja vastumõju, taustaks institutsionaliseerumise olulised etapid Hiina ajaloos. Lisa: Tabelid

Süüdiolevad maastikud = Guilty landscapes / Karel Kravik

Index Scriptorium Estoniae

Kravik, Karel

2013-01-01

Kaevandatud maale ehitatud korrusmajad Kohtla-Järve Outokumpu elamurajoonis, taustaks põlevkivitööstus suitsevate korstende ja mägedega. Tuulikupark Balti SEJ endisel jäätmehoidlal. Kaevanduslangatused põldudel

Dale Reed with model in front of M2-F1

Science.gov (United States)

1967-01-01

Dale Reed with a model of the M2-F1 in front of the actual lifting body. Reed used the model to show the potential of the lifting bodies. He first flew it into tall grass to test stability and trim, then hand-launched it from buildings for longer flights. Finally, he towed the lifting-body model aloft using a powered model airplane known as the 'Mothership.' A timer released the model and it glided to a landing. Dale's wife Donna used a 9 mm. camera to film the flights of the model. Its stability as it glided--despite its lack of wings--convinced Milt Thompson and some Flight Research Center engineers including the center director, Paul Bikle, that a piloted lifting body was possible. The lifting body concept evolved in the mid-1950s as researchers considered alternatives to ballistic reentries of piloted space capsules. The designs for hypersonic, wingless vehicles were on the boards at NASA Ames and NASA Langley facilities, while the US Air Force was gearing up for its Dyna-Soar program, which defined the need for a spacecraft that would land like an airplane. Despite favorable research on lifting bodies, there was little support for a flight program. Dryden engineer R. Dale Reed was intrigued with the lifting body concept, and reasoned that some sort of flight demonstration was needed before wingless aircraft could be taken seriously. In February 1962, he built a model lifting body based upon the Ames M2 design, and air-launched it from a radio controlled 'mothership.' Home movies of these flights, plus the support of research pilot Milt Thompson, helped pursuade the facilities director, Paul Bikle, to give the go-ahead for the construction of a full-scale version, to be used as a wind-tunnel model and possibly flown as a glider. Comparing lifting bodies to space capsules, an unofficial motto of the project was, 'Don't be Rescued from Outer Space--Fly Back in Style.' The construction of the M2-F1 was a joint effort by Dryden and a local glider manufacturer, the

"Art Plaza" oli vaieldamatult parim projekt : EKA maja / Indrek Allmann

Index Scriptorium Estoniae

Allmann, Indrek, 1972-

2008-01-01

Eesti Kunstiakadeemia uue hoone rahvusvahelisel arhitektuurikonkursil I preemia saanud Taani arhitektuuribüroode Sea + Effekt projektis "Art Plaza" on arvestatud ajaloolist konteksti ja jätkusuutlikkust. "Art Plaza" taustaks näiteid arhitektuuriajaloost

Spin squeezing as an indicator of quantum chaos in the Dicke model.

Science.gov (United States)

Song, Lijun; Yan, Dong; Ma, Jian; Wang, Xiaoguang

2009-04-01

We study spin squeezing, an intrinsic quantum property, in the Dicke model without the rotating-wave approximation. We show that the spin squeezing can reveal the underlying chaotic and regular structures in phase space given by a Poincaré section, namely, it acts as an indicator of quantum chaos. Spin squeezing vanishes after a very short time for an initial coherent state centered in a chaotic region, whereas it persists over a longer time for the coherent state centered in a regular region of the phase space. We also study the distribution of the mean spin directions when quantum dynamics takes place. Finally, we discuss relations among spin squeezing, bosonic quadrature squeezing, and two-qubit entanglement in the dynamical processes.

Study of Antigravity in an F(R) Model and in Brans-Dicke Theory with Cosmological Constant

OpenAIRE

Oikonomou, V. K.; Karagiannakis, N.

2014-01-01

We study antigravity, that is having an effective gravitational constant with a negative sign, in scalar-tensor theories originating from $F(R)$-theory and in a Brans-Dicke model with cosmological constant. For the $F(R)$ theory case, we obtain the antigravity scalar-tensor theory in the Jordan frame by using a variant of the Lagrange multipliers method and we numerically study the time dependent effective gravitational constant. As we shall demonstrate by using a specific $F(R)$ model, altho...

Shear-free axial model in massive Brans–Dicke gravity

Energy Technology Data Exchange (ETDEWEB)

Sharif, M., E-mail: msharif.math@pu.edu.pk [Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore-54590 (Pakistan); Manzoor, Rubab, E-mail: rubab.manzoor@umt.edu.pk [Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore-54590 (Pakistan); Department of Mathematics, University of Management and Technology, Johar Town Campus, Lahore-54782 (Pakistan)

2017-01-15

This paper explores the influences of dark energy on the shear-free axially symmetric evolution by considering self-interacting Brans–Dicke gravity as a dark energy candidate. We describe energy source of the model and derive all the effective dynamical variables as well as effective structure scalars. It is found that scalar field is one of the sources of anisotropy and dissipation. The resulting effective structure scalars help to study the dynamics associated with dark energy in any axial configuration. In order to investigate shear-free evolution, we formulate a set of governing equations along with heat transport equation. We discuss consequences of shear-free condition upon different SBD fluid models like dissipative non-geodesic and geodesic models. For dissipative non-geodesic case, the rotational distribution turns out to be the necessary and sufficient condition for radiating model. The dissipation depends upon inhomogeneous expansion. The geodesic model is found to be irrotational and non-radiating. The non-dissipative geodesic model leads to FRW model for positive values of the expansion parameter.

Macroscopic Quantum States and Quantum Phase Transition in the Dicke Model

International Nuclear Information System (INIS)

Lian Jin-Ling; Zhang Yuan-Wei; Liang Jiu-Qing

2012-01-01

The energy spectrum of Dicke Hamiltonians with and without the rotating wave approximation for an arbitrary atom number is obtained analytically by means of the variational method, in which the effective pseudo-spin Hamiltonian resulting from the expectation value in the boson-field coherent state is diagonalized by the spin-coherent-state transformation. In addition to the ground-state energy, an excited macroscopic quantum-state is found corresponding to the south- and north-pole gauges of the spin-coherent states, respectively. Our results of ground-state energies in exact agreement with various approaches show that these models exhibit a zero-temperature quantum phase transition of the second order for any number of atoms, which was commonly considered as a phenomenon of the thermodynamic limit with the atom number tending to infinity. The critical behavior of the geometric phase is analyzed. (general)

Ricardo Guilherme Dicke e o processo de transculturação na l iteratura

Directory of Open Access Journals (Sweden)

Adriana Lins Precioso

2014-01-01

Full Text Available The article presents a brief overview of the emergence of the cultural studies in England, the concepts of Stuart Hall and the appropriation of these searches by the literary studies, mainly in Latin America represented through the contributions of Ángel R ama. To exemplify this proposal, we analyze excerpts of the short stories „Toada do Esquecido‟ (2006, „Sinfonia equestre‟ (2006, „A proximidade do mar‟ (2011, „O Velho Moço‟ (2011 and „A perseguição‟ (2011, by Ricardo Guilherme Dicke, writer from the state of Mato Grosso, who promotes the dialogue between regional and global issues by the transculturation bias.

Intermediate accelerated solutions as generic late-time attractors in a modified Jordan-Brans-Dicke theory

Energy Technology Data Exchange (ETDEWEB)

Cid, Antonella [Grupo de Cosmología y Gravitación GCG-UBB and Departamento de Física, Universidad del Bío-Bío, Casilla 5-C, Concepción (Chile); Leon, Genly [Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4950, Valparaíso (Chile); Leyva, Yoelsy, E-mail: acidm@ubiobio.cl, E-mail: genly.leon@ucv.cl, E-mail: yoelsy.leyva@uta.cl [Departamento de Física, Facultad de Ciencias, Universidad de Tarapacá, Casilla 7-D, Arica (Chile)

2016-02-01

In this paper we investigate the evolution of a Jordan-Brans-Dicke scalar field, Φ, with a power-law potential in the presence of a second scalar field, φ, with an exponential potential, in both the Jordan and the Einstein frames. We present the relation of our model with the induced gravity model with power-law potential and the integrability of this kind of models is discussed when the quintessence field φ is massless, and has a small velocity. The fact that for some fine-tuned values of the parameters we may get some integrable cosmological models, makes our choice of potentials very interesting. We prove that in Jordan-Brans-Dicke theory, the de Sitter solution is not a natural attractor. Instead, we show that the attractor in the Jordan frame corresponds to an ''intermediate accelerated'' solution of the form a(t) ≅ e{sup α{sub 1} t{sup p{sup {sub 1}}}}, as t → ∞ where α{sub 1} > 0 and 0 < p{sub 1} < 1, for a wide range of parameters. Furthermore, when we work in the Einstein frame we get that the attractor is also an ''intermediate accelerated'' solution of the form a(t) ≅ e{sup α{sub 2} tp{sub 2}} as t → ∞ where α{sub 2} > 0 and 0

Intermediate accelerated solutions as generic late-time attractors in a modified Jordan-Brans-Dicke theory

International Nuclear Information System (INIS)

Cid, Antonella; Leon, Genly; Leyva, Yoelsy

2016-01-01

In this paper we investigate the evolution of a Jordan-Brans-Dicke scalar field, Φ, with a power-law potential in the presence of a second scalar field, φ, with an exponential potential, in both the Jordan and the Einstein frames. We present the relation of our model with the induced gravity model with power-law potential and the integrability of this kind of models is discussed when the quintessence field φ is massless, and has a small velocity. The fact that for some fine-tuned values of the parameters we may get some integrable cosmological models, makes our choice of potentials very interesting. We prove that in Jordan-Brans-Dicke theory, the de Sitter solution is not a natural attractor. Instead, we show that the attractor in the Jordan frame corresponds to an ''intermediate accelerated'' solution of the form a(t) ≅ e α 1  t p 1 , as t → ∞ where α 1  > 0 and 0 < p 1  < 1, for a wide range of parameters. Furthermore, when we work in the Einstein frame we get that the attractor is also an ''intermediate accelerated'' solution of the form a(t) ≅ e α 2  tp 2 as t → ∞ where α 2  > 0 and 0

Beïnvloeding van snelheidsgedrag door nudging : vragenlijstonderzoek naar het effect van Dick Bruna-borden op geschatte rijsnelheid binnen de bebouwde kom.

NARCIS (Netherlands)

Goldenbeld, C. Groot-Mesken, J. de & Rijsdijk, H.A.

2016-01-01

Influencing speed behaviour by nudging : questionnaire study into the effect of Dick Bruna1 traffic signs on the estimated driving speeds in urban areas. Speed is an important risk factor in traffic. Measurements within urban areas on 30- and 50 km/hour roads show that the percentage of speeders on

The Critical Point Entanglement and Chaos in the Dicke Model

Directory of Open Access Journals (Sweden)

Lina Bao

2015-07-01

Full Text Available Ground state properties and level statistics of the Dicke model for a finite number of atoms are investigated based on a progressive diagonalization scheme (PDS. Particle number statistics, the entanglement measure and the Shannon information entropy at the resonance point in cases with a finite number of atoms as functions of the coupling parameter are calculated. It is shown that the entanglement measure defined in terms of the normalized von Neumann entropy of the reduced density matrix of the atoms reaches its maximum value at the critical point of the quantum phase transition where the system is most chaotic. Noticeable change in the Shannon information entropy near or at the critical point of the quantum phase transition is also observed. In addition, the quantum phase transition may be observed not only in the ground state mean photon number and the ground state atomic inversion as shown previously, but also in fluctuations of these two quantities in the ground state, especially in the atomic inversion fluctuation.

Identification of a mutation associated with fatal Foal Immunodeficiency Syndrome in the Fell and Dales pony.

Directory of Open Access Journals (Sweden)

Laura Y Fox-Clipsham

2011-07-01

Full Text Available The Fell and Dales are rare native UK pony breeds at risk due to falling numbers, in-breeding, and inherited disease. Specifically, the lethal Mendelian recessive disease Foal Immunodeficiency Syndrome (FIS, which manifests as B-lymphocyte immunodeficiency and progressive anemia, is a substantial threat. A significant percentage (∼10% of the Fell ponies born each year dies from FIS, compromising the long-term survival of this breed. Moreover, the likely spread of FIS into other breeds is of major concern. Indeed, FIS was identified in the Dales pony, a related breed, during the course of this work. Using a stepwise approach comprising linkage and homozygosity mapping followed by haplotype analysis, we mapped the mutation using 14 FIS-affected, 17 obligate carriers, and 10 adults of unknown carrier status to a ∼1 Mb region (29.8 - 30.8 Mb on chromosome (ECA 26. A subsequent genome-wide association study identified two SNPs on ECA26 that showed genome-wide significance after Bonferroni correction for multiple testing: BIEC2-692674 at 29.804 Mb and BIEC2-693138 at 32.19 Mb. The associated region spanned 2.6 Mb from ∼29.6 Mb to 32.2 Mb on ECA26. Re-sequencing of this region identified a mutation in the sodium/myo-inositol cotransporter gene (SLC5A3; this causes a P446L substitution in the protein. This gene plays a crucial role in the regulatory response to osmotic stress that is essential in many tissues including lymphoid tissues and during early embryonic development. We propose that the amino acid substitution we identify here alters the function of SLC5A3, leading to erythropoiesis failure and compromise of the immune system. FIS is of significant biological interest as it is unique and is caused by a gene not previously associated with a mammalian disease. Having identified the associated gene, we are now able to eradicate FIS from equine populations by informed selective breeding.

On the emergence of the ΛCDM model from self-interacting Brans-Dicke theory in d= 5

Science.gov (United States)

Reyes, Luz Marina; Perez Bergliaffa, Santiago Esteban

2018-01-01

We investigate whether a self-interacting Brans-Dicke theory in d=5 without matter and with a time-dependent metric can describe, after dimensional reduction to d=4, the FLRW model with accelerated expansion and non-relativistic matter. By rewriting the effective 4-dimensional theory as an autonomous 3-dimensional dynamical system and studying its critical points, we show that the ΛCDM cosmology cannot emerge from such a model. This result suggests that a richer structure in d=5 may be needed to obtain the accelerated expansion as well as the matter content of the 4-dimensional universe.

On the emergence of the ΛCDM model from self-interacting Brans-Dicke theory in d = 5

Energy Technology Data Exchange (ETDEWEB)

Reyes, Luz Marina [CUCEI, Universidad de Guadalajara, Departamento de Ciencias Computacionales, Guadalajara (Mexico); Perez Bergliaffa, Santiago Esteban [Universidade do Estado do Rio de Janeiro, Departamento de Fisica Teorica, Instituto de Fisica, Rio de Janeiro (Brazil)

2018-01-15

We investigate whether a self-interacting Brans-Dicke theory in d = 5 without matter and with a time-dependent metric can describe, after dimensional reduction to d = 4, the FLRW model with accelerated expansion and non-relativistic matter. By rewriting the effective 4-dimensional theory as an autonomous 3-dimensional dynamical system and studying its critical points, we show that the ΛCDM cosmology cannot emerge from such a model. This result suggests that a richer structure in d = 5 may be needed to obtain the accelerated expansion as well as the matter content of the 4-dimensional universe. (orig.)

Temperature profile and water depth data collected from DALE and other platforms using BT and XBT casts in the North / South Pacific Ocean from 09 November 1979 to 25 November 1985 (NODC Accession 8900063)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Temperature profile and water depth data were collected using BT and XBT casts from the DALE and other platforms in the North / South Pacific Ocean. Data were...

Lacan Leitor de Melanie Klein: O Caso Dick em Questão

Directory of Open Access Journals (Sweden)

Ariana Lucero

Full Text Available RESUMO O artigo apresenta a leitura que Jacques Lacan faz do caso Dick, de Melanie Klein. Para tanto, a discussão com o filósofo Jean Hyppolite é retomada com o objetivo de explicitarmos como os mecanismos de Ausstossung [expulsão], Verneinung [negação] e Bejahung [afirmação], descritos por Freud em 1925, podem contribuir para a compreensão da constituição psíquica sob uma perspectiva lacaniana. Em seguida, expomos o caso, tanto para apreendermos clinicamente o que foi exposto na teoria, quanto para evidenciarmos como Lacan se distancia da concepção de fantasia de M. Klein. O tema do diagnóstico, no entanto, aparece em ambos ligado a uma forma de organização subjetiva ainda em constituição na infância, o que traz elementos para refletirmos sobre essa questão na atualidade.

Quantum signature of chaos and thermalization in the kicked Dicke model

Science.gov (United States)

Ray, S.; Ghosh, A.; Sinha, S.

2016-09-01

We study the quantum dynamics of the kicked Dicke model (KDM) in terms of the Floquet operator, and we analyze the connection between chaos and thermalization in this context. The Hamiltonian map is constructed by suitably taking the classical limit of the Heisenberg equation of motion to study the corresponding phase-space dynamics, which shows a crossover from regular to chaotic motion by tuning the kicking strength. The fixed-point analysis and calculation of the Lyapunov exponent (LE) provide us with a complete picture of the onset of chaos in phase-space dynamics. We carry out a spectral analysis of the Floquet operator, which includes a calculation of the quasienergy spacing distribution and structural entropy to show the correspondence to the random matrix theory in the chaotic regime. Finally, we analyze the thermodynamics and statistical properties of the bosonic sector as well as the spin sector, and we discuss how such a periodically kicked system relaxes to a thermalized state in accordance with the laws of statistical mechanics.

Comparative sound velocity measurements between porous rock and fully-dense material under crustal condition: The cases of Darley Dale sandstone and copper block

Science.gov (United States)

Kung, J.; Chien, Y. V.; Wu, W.; Dong, J.; Chang, Y.; Tsai, C.; Yang, M.; Wang, K.

2012-12-01

Previous studies showed that the voids and their geometry in the sedimentary rocks have great influence on the compressibility of rock, which reflects on its elastic velocities. Some models were developed to discuss the relations among velocity, porosity and void geometry. Therefore, the information of porosity, and void geometry and its distribution in rock is essential for understanding how the elastic properties of porous rocks affected by their poregeometry. In this study, we revisited a well-studied porous rock, Darley Dale sandstone, which has been studied by different groups with different purposes. Most of them are the deformation experiments. Different from previous studies, we measured the sound velocity of Darley dale sandstone under hydrostatic conditions. Also, we employed different techniques to investigate the pore geometry and porosity of Darley Dale sandstone to gain the insight of velocity changing behavior under the crustal conditions. Here, we measured a fully-dense copper block for a comparison. We performed X-ray CT scanning (XCT) to image the pore space of sandstone to construct the 3-D image of pore geometry, distribution and the pore size. The CT image data are allowed us to estimate the porosity of sandstone, too. One the other hand, the porosity of sample was measured using imbibitions method at ambient conditions and helium porosimeter at high pressure (up to 150 MPa). A set of specimens were cored from Darley Dale sandstone block. P and S wave velocities of specimens were measured at ambient conditions. We also performed high pressure velocity measurements on a selected rock specimen and a copper block up to 150 MPa under dry condition. Porosity of a set of rock specimens measured by imbibitions method was spanned from 6% to 15%, largely distributed within a range of 8%-11%. Compared the porosity obtained from three different techniques, imbibitions method, helium porosimeter and XCT, values from those measurements are in good agreement

Modified Holographic Ricci Dark Energy in Chameleon Brans–Dicke Cosmology and Its Thermodynamic Consequence

International Nuclear Information System (INIS)

Jawad, A.; Chattopadhyay, S.; Bhattacharya, S.; Pasqua, A.

2015-01-01

The objective of this paper is to discuss the Chameleon Brans–Dicke gravity with non-minimally matter coupling of scalar field. We take modified Holographic Ricci dark energy model in this gravity with its energy density in interaction with energy density of cold dark matter. We assume power-law ansatz for scale factor and scalar field to discuss potential as well as coupling functions in the evolving universe. These reconstructed functions are plotted versus scalar field and time for different values of power component of scale factor n. We observe that potential and coupling functions represent increasing behavior, in particular, consistent results for a specific value of n. Finally, we have examined validity of the generalized second law of thermodynamics and we have observed its validity for all values of n. (paper)

Fano-Agarwal couplings and non-rotating wave approximation in single-photon timed Dicke subradiance

Science.gov (United States)

Mirza, Imran M.; Begzjav, Tuguldur

2016-04-01

Recently a new class of single-photon timed Dicke (TD) subradiant states has been introduced with possible applications in single-photon-based quantum information storage and on demand ultrafast retrieval (Scully M. O., Phys. Rev. Lett., 115 (2015) 243602). However, the influence of any kind of virtual processes on the decay of these new kind of subradiant states has been left as an open question. In the present paper, we focus on this problem in detail. In particular, we investigate how pure Fano-Agarwal couplings and other virtual processes arising from non-rotating wave approximation impact the decay of otherwise sub- and superradiant states. In addition to the overall virtual couplings among all TD states, we also focus on the dominant role played by the couplings between specific TD states.

A nearly cylindrically symmetric source in Brans-Dicke gravity as the generator of the rotational curves of the galaxies

Energy Technology Data Exchange (ETDEWEB)

Santos, S.M. dos [Universidade Estadual Paulista Julio de Mesquita Filho-UNESP, Guaratingueta, SP (Brazil); Instituto Federal de Educacao, Ciencia e Tecnologia do Rio Grande do Sul-IFRS, Porto Alegre, RS (Brazil); Silva, J.M.H. da [Universidade Estadual Paulista Julio de Mesquita Filho-UNESP, Guaratingueta, SP (Brazil); Guimaraes, M.E.X. [Universidade Federal Fluminense-UFF, Instituto de Fisica, Niteroi, RJ (Brazil); Neto, J.L. [Universidade Federal do Rio de Janeiro-UFRJ, Instituto de Fisica, Rio de Janeiro, RJ (Brazil)

2017-12-15

Observation shows that the velocities of stars grow by approximately 2-3 orders of magnitude when the distances from the centers of the galaxies are in the range of 0.5-82.3 kpc, before they begin to tend to a constant value. Up to now, the reason for this behavior is still a matter for debate. In this work, we propose a model which adequately describes this unusual behavior using a (nearly) cylindrical symmetrical solution in the framework of a scalar-tensor-like (the Brans-Dicke model) theory of gravity. (orig.)

A nearly cylindrically symmetric source in Brans-Dicke gravity as the generator of the rotational curves of the galaxies

Science.gov (United States)

dos Santos, S. Mittmann; da Silva, J. M. Hoff; Guimarães, M. E. X.; Neto, J. L.

2017-12-01

Observation shows that the velocities of stars grow by approximately 2-3 orders of magnitude when the distances from the centers of the galaxies are in the range of 0.5-82.3 kpc, before they begin to tend to a constant value. Up to now, the reason for this behavior is still a matter for debate. In this work, we propose a model which adequately describes this unusual behavior using a (nearly) cylindrical symmetrical solution in the framework of a scalar-tensor-like (the Brans-Dicke model) theory of gravity.

The Brans-Dicke gravity as a theory of dark matter

International Nuclear Information System (INIS)

Kim, Hongsu

2010-01-01

The pure Brans-Dicke (BD) gravity with or without the cosmological constant Λ has been taken as a model theory for dark matter. Indeed, there has been a consensus that unless one modifies either the standard theory of gravity, namely, general relativity, or the standard model for particle physics, or both, one can never achieve a satisfying understanding of the phenomena associated with dark matter and dark energy. Along this line, our dark matter model in this work can be thought of as an attempt to modify the gravity side alone in the simplest fashion to achieve the goal. Among others, it is demonstrated that our model theory can successfully predict the emergence of a dark matter halo-like configuration in terms of a self-gravitating spacetime solution to the BD field equations and reproduce the flattened rotation curve in this dark halo-like object in terms of the non-trivial energy density of the BD scalar field, which was absent in the context of general relativity, where Newton's constant is strictly a 'constant' having no dynamics. Our model theory, however, is not entirely without flaw, such as the prediction of relativistic jets in all types of galaxies, which actually is not the case.

Walter Max Dale (formerly Deutsch) (1894-1969): pioneer and eminent radiobiochemist at the Christie Hospital and Holt Radium Institute, Manchester.

Science.gov (United States)

Shreeve, David R

2010-05-01

The political upheaval in Germany in 1933 and subsequent movement of medical scholars with the support of the Rockefeller Foundation allowed Manchester to benefit from the arrival of Dr Walter Deutsch, later known as Dr Walter Dale. His research background enabled him to develop a radiobiochemistry laboratory at the Christie Hospital and Holt Radium Institute where he became a world authority on the effects of X-rays on enzymes and also the protective effect of additional solutes. In 1959 he initiated and then edited the International Journal of Radiation Biology. By the time of his retirement in 1962 the strength of his research resulted in his laboratory being recognized by the Medical Research Council.

Dilatonic Brans-Dicke Anisotropic Collapsing Fluid Sphere And de Broglie Quantum Wave Motion

International Nuclear Information System (INIS)

Ghaffarnejad, Hossein

2016-01-01

Two dimensional (2D) analogue of vacuum sector of the Brans Dicke (BD) gravity [1] is studied to obtain dynamics of anisotropic spherically symmetric perfect fluid. Our obtained static solutions behave as dark matter with state equation but in non-static regimes behave as regular perfect fluid with barotropic index ϒ > 0. Positivity property of total mass of the fluid causes that the BD parameter to be ω >2/3 and/or ω 0 the apparent horizon is covered by event horizon where the cosmic censorship hypothesis is still valid. According to the model [1], we obtain de Broglie pilot wave of our metric solution which describes particles ensemble which become distinguishable via different values of ω . Incident current density of particles ensemble on the horizons is evaluated which describe the ‘Hawking radiation’. The de Brogle-Bohm quantum potential effect is calculated also on the event (apparent) horizon which is independent (dependent) to values of ω . (paper)

Eternal extended inflation and graceful exit from old inflation without Jordan-Brans-Dicke

International Nuclear Information System (INIS)

Linde, A.

1990-01-01

Recently a possible solution to the graceful exit problem of the old inflation was proposed in the context of the Jordan-Brans-Dicke theory (extended inflation). In this paper we will argue that inflation in this theory occurs in a most natural way if it starts near the Planck density, as in the standard version of chaotic inflation. With most natural initial conditions, the inflationary universe in the JBD theory enters the stage of permanent reproduction of new inflationary domains (eternal extended inflation). In order to realize the extended inflation scenario at least two classical scalar fields driving inflation are necessary, as distinct from the simplest versions of new and chaotic inflation. It is shown that in the theory of two scalar fields one can solve the graceful exit problem even without modifying the Einstein gravity theory, due to the possibility that the decay rate of the false vacuum in old inflation depends on the value of the second scalar field and hence on time. (orig.)

Non-singular Brans–Dicke collapse in deformed phase space

Energy Technology Data Exchange (ETDEWEB)

Rasouli, S.M.M., E-mail: mrasouli@ubi.pt [Departamento de Física, Universidade da Beira Interior, Rua Marquês d’Avila e Bolama, 6200 Covilhã (Portugal); Centro de Matemática e Aplicações (CMA - UBI), Universidade da Beira Interior, Rua Marquês d’Avila e Bolama, 6200 Covilhã (Portugal); Physics Group, Qazvin Branch, Islamic Azad University, Qazvin (Iran, Islamic Republic of); Ziaie, A.H., E-mail: ah_ziaie@sbu.ac.ir [Department of Physics, Shahid Beheshti University, G. C., Evin, 19839 Tehran (Iran, Islamic Republic of); Department of Physics, Shahid Bahonar University, PO Box 76175, Kerman (Iran, Islamic Republic of); Jalalzadeh, S., E-mail: shahram.jalalzadeh@unila.edu.br [Federal University of Latin-American Integration, Technological Park of Itaipu PO box 2123, Foz do Iguaçu-PR, 85867-670 (Brazil); Moniz, P.V., E-mail: pmoniz@ubi.pt [Departamento de Física, Universidade da Beira Interior, Rua Marquês d’Avila e Bolama, 6200 Covilhã (Portugal); Centro de Matemática e Aplicações (CMA - UBI), Universidade da Beira Interior, Rua Marquês d’Avila e Bolama, 6200 Covilhã (Portugal)

2016-12-15

We study the collapse process of a homogeneous perfect fluid (in FLRW background) with a barotropic equation of state in Brans–Dicke (BD) theory in the presence of phase space deformation effects. Such a deformation is introduced as a particular type of non-commutativity between phase space coordinates. For the commutative case, it has been shown in the literature (Scheel, 1995), that the dust collapse in BD theory leads to the formation of a spacetime singularity which is covered by an event horizon. In comparison to general relativity (GR), the authors concluded that the final state of black holes in BD theory is identical to the GR case but differs from GR during the dynamical evolution of the collapse process. However, the presence of non-commutative effects influences the dynamics of the collapse scenario and consequently a non-singular evolution is developed in the sense that a bounce emerges at a minimum radius, after which an expanding phase begins. Such a behavior is observed for positive values of the BD coupling parameter. For large positive values of the BD coupling parameter, when non-commutative effects are present, the dynamics of collapse process differs from the GR case. Finally, we show that for negative values of the BD coupling parameter, the singularity is replaced by an oscillatory bounce occurring at a finite time, with the frequency of oscillation and amplitude being damped at late times.

Non-singular Brans–Dicke collapse in deformed phase space

International Nuclear Information System (INIS)

Rasouli, S.M.M.; Ziaie, A.H.; Jalalzadeh, S.; Moniz, P.V.

2016-01-01

We study the collapse process of a homogeneous perfect fluid (in FLRW background) with a barotropic equation of state in Brans–Dicke (BD) theory in the presence of phase space deformation effects. Such a deformation is introduced as a particular type of non-commutativity between phase space coordinates. For the commutative case, it has been shown in the literature (Scheel, 1995), that the dust collapse in BD theory leads to the formation of a spacetime singularity which is covered by an event horizon. In comparison to general relativity (GR), the authors concluded that the final state of black holes in BD theory is identical to the GR case but differs from GR during the dynamical evolution of the collapse process. However, the presence of non-commutative effects influences the dynamics of the collapse scenario and consequently a non-singular evolution is developed in the sense that a bounce emerges at a minimum radius, after which an expanding phase begins. Such a behavior is observed for positive values of the BD coupling parameter. For large positive values of the BD coupling parameter, when non-commutative effects are present, the dynamics of collapse process differs from the GR case. Finally, we show that for negative values of the BD coupling parameter, the singularity is replaced by an oscillatory bounce occurring at a finite time, with the frequency of oscillation and amplitude being damped at late times.

Monitoring of radon gas in caves of the Yorkshire Dales, United Kingdom

International Nuclear Information System (INIS)

Langridge, D; Stokes, R P; Jackson, C P

2010-01-01

A number of vocational training courses are held in caves in the Yorkshire Dales region of the United Kingdom. The instructors and students involved in these courses have the potential to be exposed to enhanced levels of radon ( 222 Rn) and its progeny as a result of their occupations. A prior radiological risk assessment for the training courses recommended that an environmental monitoring programme be carried out to establish the radon concentrations in the caves, and that the caving instructors wear personal radon dosemeters. Radon gas concentrations varied seasonally, being at their highest in summer and their lowest in winter. The lowest result was 40 Bq m -3 recorded in Lower Longchurn cave during winter, whilst the highest result was 4440 Bq m -3 recorded in Crackpot cave during the summer. As the individuals involved in the caving are entering atmospheres with radon gas concentrations in excess of 400 Bq m -3 , the Ionising Radiation Regulations 1999 (GB Parliament 2000 Ionising Radiations Regulations 1999 (London: Stationary Office) SI 1999/3232) apply. A system of work is therefore in place to control exposure to radon. This system of work stipulates an initial dose investigation level of 1 mSv, a second dose investigation level of 2 mSv and an annual dose limit of 6 mSv. The highest annual dose recorded to date is 2.2 mSv, although the average (median) annual dose is only 0.5 mSv.

Modified Holographic Ricci Dark Energy in Chameleon Brans-Dicke Cosmology and Its Thermodynamic Consequence

Science.gov (United States)

Jawad, A.; Chattopadhyay, S.; Bhattacharya, S.; Pasqua, A.

2015-04-01

The objective of this paper is to discuss the Chameleon Brans-Dicke gravity with non-minimally matter coupling of scalar field. We take modified Holographic Ricci dark energy model in this gravity with its energy density in interaction with energy density of cold dark matter. We assume power-law ansatz for scale factor and scalar field to discuss potential as well as coupling functions in the evolving universe. These reconstructed functions are plotted versus scalar field and time for different values of power component of scale factor n. We observe that potential and coupling functions represent increasing behavior, in particular, consistent results for a specific value of n. Finally, we have examined validity of the generalized second law of thermodynamics and we have observed its validity for all values of n. The financial Supported from Department of Science and Technology, Govt. of India under Project Grant No. SR/FTP/PS-167/2011 is thankfully acknowledged by SC

Eternal extended inflation and graceful exit from old inflation without Jordan-Brans-Dicke

Science.gov (United States)

Linde, Andrei

1990-10-01

Recently a possible solution to the graceful exit problem of the old inflation was proposed in the context of the Jordan-Brans-Dicke theory (extended inflation). In this paper we will argue that inflation in this theory occurs in a most natural way if it starts near the Planck density, as in the standard version of chaotic inflation. With most natural initial conditions, the inflationary universe in the JBD theory enters the stage of permanent reproduction of new inflationary domains (eternal extended inflation). In order to realize the extended inflation scenario at least two classical scalar fields driving inflation are necessary, as distinct from the simplest versions of new and chaotic inflation. It is shown that in the theory of two scalar fields one can solve the graceful exit problem even without modifying the Einstein gravity theory, due to the possibility that the decay rate of the false rate vacuum in old inflation depends on the value of the second scalar field and hence on time. Address after 1 September 1990: Physics Department, Stanford University, Varian Building, Stanford, CA 94305, USA.

Dynamics of coherent states in regular and chaotic regimes of the non-integrable Dicke model

Science.gov (United States)

Lerma-Hernández, S.; Chávez-Carlos, J.; Bastarrachea-Magnani, M. A.; López-del-Carpio, B.; Hirsch, J. G.

2018-04-01

The quantum dynamics of initial coherent states is studied in the Dicke model and correlated with the dynamics, regular or chaotic, of their classical limit. Analytical expressions for the survival probability, i.e. the probability of finding the system in its initial state at time t, are provided in the regular regions of the model. The results for regular regimes are compared with those of the chaotic ones. It is found that initial coherent states in regular regions have a much longer equilibration time than those located in chaotic regions. The properties of the distributions for the initial coherent states in the Hamiltonian eigenbasis are also studied. It is found that for regular states the components with no negligible contribution are organized in sequences of energy levels distributed according to Gaussian functions. In the case of chaotic coherent states, the energy components do not have a simple structure and the number of participating energy levels is larger than in the regular cases.

Profile and bioconcentration of minerals by King Bolete (Boletus edulis) from the Płocka Dale in Poland.

Science.gov (United States)

Frankowska, Aneta; Ziółkowska, Joanna; Bielawski, Leszek; Falandysz, Jerzy

2010-01-01

This study aimed to provide basic data on the composition of metallic elements, including toxicologically important Cd and Hg, in popular and prized wild King Bolete mushrooms. We investigated the importance of soil substratum as a source of these metals. ICP-OES and CV-AAS were applied to determine the profile of Al, Ba, Ca, Cd, Cu, Fe, Hg, K, Mg, Mn, Na, Sr and Zn in caps and stipes of King Bolete mushroom and in the surface layer of soil (0-10 cm) from the Płocka Dale area of Poland. Hg, Cu, Cd, Zn, Mg and K exhibited bioconcentration factors (BCF) > 1. Specifically, Hg, Cu and Cd (mean BCFs for caps were 110, 19 and 16, respectively) were efficiently bioconcentrated by King Bolete, while other elements were bioexcluded (BCF < 1). Cadmium was present in the caps at mean levels of 5.5 ± 2.4 mg kg(-1) dry weight (dw) and mercury at levels of 4.9 ± 1.4 mg kg(-1) dw, both occurring at elevated concentrations in those King Bolete mushrooms surveyed.

The UK-DALE dataset, domestic appliance-level electricity demand and whole-house demand from five UK homes.

Science.gov (United States)

Kelly, Jack; Knottenbelt, William

2015-01-01

Many countries are rolling out smart electricity meters. These measure a home's total power demand. However, research into consumer behaviour suggests that consumers are best able to improve their energy efficiency when provided with itemised, appliance-by-appliance consumption information. Energy disaggregation is a computational technique for estimating appliance-by-appliance energy consumption from a whole-house meter signal. To conduct research on disaggregation algorithms, researchers require data describing not just the aggregate demand per building but also the 'ground truth' demand of individual appliances. In this context, we present UK-DALE: an open-access dataset from the UK recording Domestic Appliance-Level Electricity at a sample rate of 16 kHz for the whole-house and at 1/6 Hz for individual appliances. This is the first open access UK dataset at this temporal resolution. We recorded from five houses, one of which was recorded for 655 days, the longest duration we are aware of for any energy dataset at this sample rate. We also describe the low-cost, open-source, wireless system we built for collecting our dataset.

A Japanese-American Sam Spade: The Metaphysical Detective in Death in Little Tokyo, by Dale Furutani

Directory of Open Access Journals (Sweden)

Portilho Carla

2017-06-01

Full Text Available The aim of this essay is to discuss the legacy of the roman noir in contemporary detective fiction produced outside the hegemonic center of power, here represented by the novel Death in Little Tokyo (1996, written by Japanese-American author Dale Furutani. Starting from the concept of the metaphysical detective (Haycraft 76; Holquist 153-156, characterized by deep questioning about narrative, interpretation, subjectivity, the nature of reality and the limits of knowledge, this article proposes a discussion about how these literary works, which at first sight represent a traditionally Anglo-American genre, constitute narratives that aim to rescue the memory, history and culture of marginalized communities. Typical of late modernity detective fiction, the metaphysical detective has none of the positivistic detective’s certainties, as he does not share in his Cartesian notion of totality, being presented instead as a successor of the hardboiled detective of the roman noir. In this article I intend to analyze the paths chosen by the author and discuss how his re-reading of the roman noir dialogues with the texts of hegemonic noire detective fiction, inscribing them in literary tradition and subverting them at the same time.

Dynamic recrystallization mechanisms and their transition in the Daling Thrust (DT) zone, Darjeeling-Sikkim Himalaya

Science.gov (United States)

Ghosh, Subhajit; Bose, Santanu; Mandal, Nibir; Dasgupta, Sujoy

2016-04-01

The Daling Thrust (DT) delineates a zone of intense shear localization in the Lesser Himalayan Sequence (LHS) of the Darjeeling-Sikkim Himalaya. From microstructural studies of deformed quartzite samples, we show a transition in the dynamic recrystallization mechanism with increasing distance from the DT, dominated by grain boundary bulging (BLG) recrystallization closest to the DT, and progressively replaced by sub-grain rotation (SGR) recrystallization away from the thrust. The transition is marked by a characteristic variation in the fractal dimension (D) of grain boundaries, estimated from the area-perimeter method. For the BLG regime, D ≈ 1.046, which decreases significantly to a value as low as 1.025 for the SGR regime. Using the available thermal data for BLG and SGR recrystallization, we infer increasing deformation temperatures away from the DT in the hanging wall. Based on the quartz piezometer our estimates reveal strong variations in the flow stress (59.00 MPa to 16.00 MPa) over a distance of 1.2 km from the DT. Deformation mechanism maps constructed for different temperatures indicate that the strain rates (10- 12 S- 1 to 10- 14 S- 1) comply with the geologically possible range. Finally, we present a mechanical model to provide a possible explanation for the cause of stress intensification along the DT.

Kaks Jeanne d'Arci ja Nosferatu / Sirje Normet

Index Scriptorium Estoniae

Normet, Sirje

2006-01-01

IX Pimedate Ööde Filmifestival. Lähemalt kontsert-filmiseansist Tallinnas, kus Theodor Dreyeri tummfilmi "Jeanne d'Arci kannatused" (Prantsusmaa 1928) saatis prantsuse muusik Hector Zazou; Dzhanik Faizijevi mängufilmist "Türgi gambiit" (Venemaa 2005); Friedrich Wilhelm Murnau õudusfilmist "Nosferatu - õuduste sümfoonia" (Saksamaa 1922), mida näidati 1. dets. Viru Keskuses ja mille taustaks mängis ansambel Kriminaalne Elevant

Quantum phase transitions of light in a dissipative Dicke-Bose-Hubbard model

Science.gov (United States)

Wu, Ren-Cun; Tan, Lei; Zhang, Wen-Xuan; Liu, Wu-Ming

2017-09-01

The impact that the environment has on the quantum phase transition of light in the Dicke-Bose-Hubbard model is investigated. Based on the quasibosonic approach, mean-field theory, and perturbation theory, the formulation of the Hamiltonian, the eigenenergies, and the superfluid order parameter are obtained analytically. Compared with the ideal cases, the order parameter of the system evolves with time as the photons naturally decay in their environment. When the system starts with the superfluid state, the dissipation makes the photons more likely to localize, and a greater hopping energy of photons is required to restore the long-range phase coherence of the localized state of the system. Furthermore, the Mott lobes depend crucially on the numbers of atoms and photons (which disappear) of each site, and the system tends to be classical with the number of atoms increasing; however, the atomic number is far lower than that expected under ideal circumstances. As there is an inevitable interaction between the coupled-cavity array and its surrounding environment in the actual experiments, the system is intrinsically dissipative. The results obtained here provide a more realistic image for characterizing the dissipative nature of quantum phase transitions in lossy platforms, which will offer valuable insight into quantum simulation of a dissipative system and which are helpful in guiding experimentalists in open quantum systems.

WWER440 few group data library preparation and its application in MOBY-DICK modular system

International Nuclear Information System (INIS)

Krysl, V.; Mikolas, P.; Svarny, J.

2002-01-01

Paper provides summary of methodology of few-group library preparation with emphasis on new features of assemblies, like fuel assemblies with Gd burnable poison or Control Fuel Assembly with Hf plates. Special attention is devoted to the transient part (coupler) of Control Fuel Assembly from the point of view of boundary conditions preparation. Based of this methodology prepared library is implemented into macro code for different number of axial meshes for both coarse and fine mesh diffusion calculations. Problems with local power peaking calculations in WWER-440 cores are closely connected with the correct modeling of the power perturbations in the neighbourhood of Control Fuel Assembly coupler. The new version of MOBY-DICK provided with the new few group data library can assess most of effects induced by insertion of Control Fuel Assembly in the core including effects of newly designed Hf plates in the coupler of Control Fuel Assembly. Compatibility of transport and diffusion calculation was taken into account in the analysis of Control Fuel Assembly movement without/with Hf plates (Authors)

The UK-DALE dataset, domestic appliance-level electricity demand and whole-house demand from five UK homes

Science.gov (United States)

Kelly, Jack; Knottenbelt, William

2015-03-01

Many countries are rolling out smart electricity meters. These measure a home’s total power demand. However, research into consumer behaviour suggests that consumers are best able to improve their energy efficiency when provided with itemised, appliance-by-appliance consumption information. Energy disaggregation is a computational technique for estimating appliance-by-appliance energy consumption from a whole-house meter signal. To conduct research on disaggregation algorithms, researchers require data describing not just the aggregate demand per building but also the ‘ground truth’ demand of individual appliances. In this context, we present UK-DALE: an open-access dataset from the UK recording Domestic Appliance-Level Electricity at a sample rate of 16 kHz for the whole-house and at 1/6 Hz for individual appliances. This is the first open access UK dataset at this temporal resolution. We recorded from five houses, one of which was recorded for 655 days, the longest duration we are aware of for any energy dataset at this sample rate. We also describe the low-cost, open-source, wireless system we built for collecting our dataset.

Revisiting the Classic Moby Dick: The Environmental Significance of the Narrative in the Light of International Environmental Law on the Preservation of the Whaling Marine Life

Directory of Open Access Journals (Sweden)

Ana Cristina Alves de Paula

2016-12-01

Full Text Available This article aims to analyze the environmental significance of Moby Dick, narrative that, in the mid-nineteenth century, warned, indirectly, on the need to preserve nature against the excesses of whaling. For this, we analyzed the main regulations that composes the environmental protection regime for whaling marine life, one of which allowed exceptions to the prohibition of hunting, based both on alleged scientific research needs as the claim of cultural practices, and the decision of the ICJ in the case brought by Australia in face of Japan.

Science Fiction and the Risks of the Anthropocene: Anticipated Transformations in Dale Pendell’s The Great Bay

Directory of Open Access Journals (Sweden)

Weik von Mossner, Alexa

2014-11-01

Full Text Available Covering the time span from 2021 to 16000 N.C., Dale Pendell’s speculative novel The Great Bay chronicles the profound climatic, geological and ecological transformations that California undergoes during these fourteen millennia. Human life becomes unimaginably small on such a time scale, and Pendell responds to that representational challenge by compiling a wide variety of texts that zero in on individual humans at different points in the future rather than offering a continuous story or central character. In a way, that place is taken by the geographical region that is the focus of the narrative and gives the book its title. Timothy Morton has argued that because we live in the Anthropocene we can no longer understand history as exclusively human. Pendell’s “Chronicle of the Collapse” suggests that the same is true for storytelling, offering readers the story of a nonhuman protagonist that changes slowly over time. The result is a highly fragmented narrative that is interesting for what it tries to achieve but at the same time remarkably unengaging. In its distant and distanced rendering of future ecological change and human anguish, The Great Bay is a grave reminder not only of the incalculable risks of the Anthropocene, but also of the basic tenets of realist storytelling.

The utility of Pinus sylvestris L. in dendrochemical investigations: pollution impact of lead mining and smelting in Darley Dale, Derbyshire, UK.

Science.gov (United States)

Lageard, J G A; Howell, J A; Rothwell, J J; Drew, I B

2008-05-01

This research investigates atmospheric pollution from an isolated and increasingly productive lead-smelting site by examining the dendrochemistry of Pinus sylvestris growing in the local environment and at control sites. Tree increment cores and soil in the rooting environment were analysed for lead content. Inter-site comparisons of lead-in-soil suggest that contamination of the soil may be a less important pathway for lead inclusion within wood than pathways via bark or needles. Levels of lead-in-wood (up to 38mgkg(-1)) are at the upper end of those previously reported. There is evidence of radial translocation of lead towards the heartwood and variability in intra-site dendrochemical records. Mean site lead-in-wood records can however be related to a well-documented pollution chronology and also suggest the importance of local topography in the dispersal and deposition of particulate lead. This study demonstrates that P. sylvestris can be used to estimate the scale and timing of past pollution episodes in similar environmental contexts to those investigated at Darley Dale, where precisely dated pollution chronologies are lacking.

Extended phase space thermodynamics and P-V criticality: Brans-Dicke-Born-Infeld vs. Einstein-Born-Infeld-dilaton black holes

Energy Technology Data Exchange (ETDEWEB)

Hendi, S.H. [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), P. O. Box 55134-441, Maragha (Iran, Islamic Republic of); Tad, R.M.; Armanfard, Z.; Talezadeh, M.S. [Shiraz University, Physics Department and Biruni Observatory, College of Sciences, Shiraz (Iran, Islamic Republic of)

2016-05-15

Motivated by a thermodynamic analogy of black holes and Van der Waals liquid/gas systems, in this paper, we study P-V criticality of both dilatonic Born-Infeld black holes and their conformal solutions, Brans-Dicke-Born-Infeld solutions. Due to the conformal constraint, we have to neglect the old Lagrangian of dilatonic Born-Infeld theory and its black hole solutions, and introduce a new one. We obtain spherically symmetric nonlinearly charged black hole solutions in both Einstein and Jordan frames and then we calculate the related conserved and thermodynamic quantities. After that, we extend the phase space by considering the proportionality of the cosmological constant and thermodynamical pressure. We obtain critical values of the thermodynamic coordinates through numerical methods and plot the relevant P-V and G-T diagrams. Investigation of the mentioned diagrams helps us to study the thermodynamical phase transition. We also analyze the effects of varying different parameters on the phase transition of black holes. (orig.)

Sterilization of health care products - Chemical indicators - Part 5: Class 2 indicators for Bowie and Dick-type air removal tests. 2. ed.

International Nuclear Information System (INIS)

2007-01-01

The air removal test is used to evaluate the efficacy of air removal during the pre-vacuum phase of a prevacuum sterilization cycle or during the pulsing stage of positive pulsing cycles if non-condensable gases were present in the steam. Retention of air due to an inefficient air removal stage or the presence of an air leak or non-condensable gases during the air removal stage are circumstances which can lead to failure of the test. This part of ISO 11140 describes the requirements for Class 2 indicators for Bowie and Dick-type air removal test sheets and packs. For a description of the classes of chemical indicators, see ISO 11140-1. The difference between the steam penetration test (ISO 11140-3 and ISO 11140-4) and the air removal test (ISO 11140-5) is described in the chemical indicator guidance document (ISO 15882). This part of ISO 11140 specifies the requirements for Class 2 indicators for Bowie and Dick-type air removal tests used to evaluate the effectiveness of air removal during the pre-vacuum phase of pre-vacuum steam sterilization cycles. Additionally, this part of ISO 11140 includes test methods and equipment used to meet these performance requirements. The paper provides information on scope, normative references, terms and definitions, general requirements, indicator system, its format and performance, indicator, its format and performance, packaging and labelling, quality assurance and sampling conditioning. 7 annexes report on the determination of the degree of contrast between the colour of the substrate and the indicator agent, the method of determining uniform colour change on exposure to saturated steam, the method of determining indicator colour change on exposure to dry heat, the method of determining transfer of indicator agent to standard test pack, standard test pack, the method of determining non-uniform colour change on exposure to a standard fault condition, and the steam exposure apparatus. Finally a bibliography is provided

Fiktsiooni nõrk messianistlik jõud : luhtumiselt lunastusele / Jaak Tomberg, Jüri Lipping

Index Scriptorium Estoniae

Tomberg, Jaak, 1980-

2007-01-01

Kirjatöö lähtub Walter Benjamini (1892-1940)"Ajaloofilosoofilistest teesidest", seob need Eric Santneri (1955), Maurice Blanchot' (1907-2003), Jacques Derrida (1930-2004) ja Slavoj Zhizheki (1949) mõtetega, näidates selle kaudu tegelikkuse luhtumuslikku loomust ja fiktsiooni lunastavat otstarvet, võttes Christa Wolfi (1929) ja Mati Undi (1944-2005) teosed taustaks. Üritatakse vastata küsimustele, kuidas tuvastada ja kirjeldada võimalikkuste virtuaalset välja ajaloos, kuidas kirjeldada seeläbi fiktsiooni ja kuidas fiktsioon kandub tegelikkuse ontoloogilise konstitueerija rollist üle millekski ajaliseks - aja "loolisuse" ehituskiviks

The utility of Pinus sylvestris L. in dendrochemical investigations: Pollution impact of lead mining and smelting in Darley Dale, Derbyshire, UK

International Nuclear Information System (INIS)

Lageard, J.G.A.; Howell, J.A.; Rothwell, J.J.; Drew, I.B.

2008-01-01

This research investigates atmospheric pollution from an isolated and increasingly productive lead-smelting site by examining the dendrochemistry of Pinus sylvestris growing in the local environment and at control sites. Tree increment cores and soil in the rooting environment were analysed for lead content. Inter-site comparisons of lead-in-soil suggest that contamination of the soil may be a less important pathway for lead inclusion within wood than pathways via bark or needles. Levels of lead-in-wood (up to 38 mg kg -1 ) are at the upper end of those previously reported. There is evidence of radial translocation of lead towards the heartwood and variability in intra-site dendrochemical records. Mean site lead-in-wood records can however be related to a well-documented pollution chronology and also suggest the importance of local topography in the dispersal and deposition of particulate lead. This study demonstrates that P. sylvestris can be used to estimate the scale and timing of past pollution episodes in similar environmental contexts to those investigated at Darley Dale, where precisely dated pollution chronologies are lacking. - Mean site dendrochemical records for Pinus sylvestris can be used to estimate the general scale and timing of atmospheric pollution episodes

En camino hacia el Moby Dick de Herman Melville, encontré… Algunas notas preliminares de un libro sin escribir On My Way to Herman Melville’s Moby Dick, I Found … Some Preliminary Remarks from an Unwritten Book

Directory of Open Access Journals (Sweden)

Burkard Sievers

2009-06-01

Full Text Available Propósito: El autor está revisitando el cuerpo de sus manuscritos sobre el Moby Dick de Herman Melville, que comenzó a escribir hace unos 15 años. Aunque estos escritos siguen constituyendo un “libro sin escribir”, las obras de Melville tuvieron un impacto duradero sobre su pensamiento - abrieron nuevo caminos de inspiración- y escritura hasta el presente. El objetivo del documento es revelar algunas experiencias, estímulos, dificultades y emociones concomitantes con la escritura académica que siguen estando en su mayoría, escondidas del lector. Diseño/ metodología/acercamiento: Este artículo es una reminiscencia personal sobre la experiencia de la escritura académica de unas cuatro décadas. Es una historia de cómo un académico se familiariza con, y luego es influenciado/inspirado por una obra literaria, y descubre cuántos tópicos organizacionales pueden ser iluminados por trabajos literarios. Descubrimientos: Ni siquiera un libro sin escribir lleva necesariamente a descuidar completamente lo que había sido escrito. Esto podría ser un alivio y un estímulo para otros, quienes se dan cuenta de que no están solos en este sentido. Originalidad/valor: el artículo aporta un poco más de entendimiento sobre la experiencia no-tan-obvia y generalmente escondida, del “proceso de producción” de la escritura académica, e ilustra la relevancia e importancia de la literatura para pensar más allá, tópicos tales como la Administración y la organización.Purpose: The author is revisiting the body of his manuscripts on Herman Melville’s Moby Dick, which he began writing some 15 years ago. Though these writings have remained an ‘unwritten book’, Melville’s works had a lasting impact on his thinking and writing up to the present. He reveals some of the experiences and emotions concomitant with academic writing that remain more often than not hidden from the reader. Design/methodology/approach: This paper is a personal

The Former Miss Barstow with every Tom, Dick and Harry in a doll's house

Directory of Open Access Journals (Sweden)

Richard Newton

2015-02-01

Full Text Available Julie Holledge, panel chairperson and member of the International Ibsen Committee, invited myself along with 3 others to participate in the Inaugural Artists’ Keynote Panel: Applied Ibsen on Four Continents: The Artists’ Intentions. My presentation focused on “The Former Miss Barstow with every Tom, Dick and Harry in a doll’s house.” This was an adaptation of Ibsen’s “A Doll’s House” produced and staged in Los Angeles, California, 1987.  For the XIIIth International Ibsen Conference at the University of Tromsø, Norway, I projected images; a few found on the internet, and many from the production itself, as well as a video clip shown streaming live from YouTube. The article describes the social context of the 80s, analyzes the reinterpretation of Ibsen’s characters, and sets out to explain the symbology of the sets and costumes. I also touch on the differences between this production and Ibsen’s original in four important aspects. These would be the macaroons, the Tarantella, the silk stockings and the end of the play. Finally, I explain my decision to upload this version of “A Doll’s House,’ scene by scene, to my page on YouTube. Having shown films and videos for many years at festivals around the globe, I was looking for a way to step outside that box and reach an international audience just beyond my keyboard. In all of these ways, the goal has been to illuminate the ways in which an artist takes Ibsen’s text and applies it to the specific social context of their time and culture.

Dragging effect on the inertial frame and the contribution of matter to the gravitational ''constant'' in a closed cosmological model of the Brans-Dicke theory

International Nuclear Information System (INIS)

Miyazaki, A.

1979-01-01

The perturbation by a spherical rotating shell is investigated in a closed homogeneous and isotropic cosmological model of the Brans-Dicke theory to first order in an angular velocity of the shell. This model has a negative coupling parameter of the scalar field and satisfies the relation G (t) M/c 2 a (t) = π. The inertial frame at the origin is dragged completely with the same angular velocity when the rotating shell covers the whole universe. By a similar perturbation method, the distance dependence of the contribution from matter to the scalar field at the origin is obtained in this model. The contribution from nearby matter is negative because of the negative coupling constant, but the contribution from the whole universe is positive. The gravitational ''constant'' is almost determined by matter in the distant region

77 FR 49360 - Final Flood Elevation Determinations

Science.gov (United States)

2012-08-16

... confluence. Casey Branch (backwater effects from From the Dale Hollow Lake +663 Unincorporated Areas of Dale Hollow Lake). confluence to Cumberland County. approximately 0.5 mile upstream of the Dale Hollow Lake.... Dale Hollow Lake (Obey River) Entire shoreline within +663 Unincorporated Areas of community...

Anisotropic Bianchi-V dark energy model under the new perspective of accelerated expansion of the universe in Brans-Dicke theory of gravitation

Science.gov (United States)

Jaiswal, Rekha; Zia, Rashid

2018-04-01

In this paper, we have proposed a cosmological model, which is consistent with the new findings of `The Supernova Cosmology project' headed by Saul Perlmutter, and the `High-Z Supernova Search team', headed by Brian Schimdt. According to these new findings, the universe is undergoing an expansion with an increasing rate, in contrast to the earlier belief that the rate of expansion is constant or the expansion is slowing down. We have considered spatially homogeneous and anisotropic Bianchi-V dark energy model in Brans-Dicke theory of gravitation. We have taken the scale factor a(t)=k t^α e^{β t} , which results into variable deceleration parameter (DP). The graph of DP shows a transition from positive to negative, which shows that universe has passed through the past decelerated expansion to the current accelerated expansion phase. In this context, we have also calculated and plotted various parameters and observed that these are in good agreement with physical and kinematic properties of the universe and are also consistent with recent observations.

Parallel editing, multi-positionality and maximalism – cosmopolitan effects as explored in some art works by Melanie Jackson and Vivienne Dick

Directory of Open Access Journals (Sweden)

Rachel Garfield

2013-08-01

Full Text Available Garfield produces a critique of minimalist art practice by demonstrating how the artist Melanie Jackson’s Some things you are not allowed to send around the world (2003 and 2006 and the experimental film-maker Vivienne Dick’s Liberty’s booty (1980 – neither of which can be said to be about feeling ‘at home’ in the world, be it as a resident or as a nomad – examine global humanity through multi-positionality, excess and contingency, and thereby begin to articulate a new cosmopolitan relationship with the local – or, rather, with many different localities – in one and the same maximalist sweep of the work. ‘Maximalism’ in Garfield’s coinage signifies an excessive overloading (through editing, collage, and the sheer density of the range of the material that enables the viewer to insert themselves into the narrative of the work. In the art of both Jackson and Dick Garfield detects a refusal to know or to judge the world; instead, there is an attempt to incorporate the complexities of its full range into the singular vision of the work, challenging the viewer to identify what is at stake.

The Treatment of Acute Ankle Sprain by Acupuncture at Xiaojie and Daling Point Combined with Movement%针刺小节穴、大陵穴配合运动治疗急性踝关节扭伤

Institute of Scientific and Technical Information of China (English)

黄义专

2015-01-01

目的 观察针刺小节穴、大陵穴配合运动治疗急性踝关节扭伤的临床疗效. 方法 选择64例急性踝关节扭伤患者,随机分为2组(各组32例);对照组采用外敷新伤药治疗,观察组采用针刺小节穴、大陵穴配合运动治疗;记录前两次治疗前后、疗程结束时综合评分,采用统计学分析. 结果 观察组临床痊愈率为68. 75%,对照组临床痊愈率为37.50%;观察组疗程为(2.34 ±0.79)d,对照组疗程为(5.56 ±2.11)d;两组比较,临床痊愈率、疗程差异有统计学意义(P＜0. 05). 结论 针刺小节穴、大陵穴配合运动治疗急性踝关节扭伤能较快改善症状、缩短疗程,远期疗效明显,值得临床推广.%Objective To observe the effects of acupuncture at Xiaojie and Daling point combined with movement in the treatment of acute ankle sprain. Methods 64 cases of patients with o acute ankle sprain were randomly divided into 2 groups (32 cases in each group);Patients of control group were treated with external application using Chinese drugs. Patients of observation group were treated with acupuncture at Xiaojie and Daling point combined with movement. Record the comprehensive score before and after treatment at the fist and the second and the last time, then analysied by SPSS19. 0. Results The clinical cure rate was 68. 75% in the observation group, the clinical cure rate is 37. 50% in the control group;the observation group course of treatment were 2. 34 ± 0. 79 days, the control group course of treatment were(5. 56 ± 2. 11)days; the data of two groups had significant difference with the clinical cure rate, and course of treatment (P＜0. 05). Conclusion Acupuncture at Xiaojie and Daling point combined with movement can quickly improve symptoms, shorten the course of treatment of the patient with acute ankle sprain, and has a conspicuous long-term effect and is worthy of popularizing.

75 FR 72869 - Louisville & Indiana Railroad Company-Trackage Rights Exemption-CSX Transportation, Inc.

Science.gov (United States)

2010-11-26

... Belt Subdivision via Dale southeast wye or Dale northeast wye at milepost QSL 1.7, a distance of 2.3... at Dale and milepost QIB 3.2 at CP Woods; (ii) Crawfordsville Branch extending between milepost QSC 1... milepost QIB 5.9 at Dale and milepost QIB 2.9 at CP 1; and (ii) Indianapolis Terminal Subdivision extending...

Savisaare jõuluime taustaks on valimiseelne leping Kruudaga / Hannes Krause

Index Scriptorium Estoniae

Krause, Hannes

2005-01-01

Keskerakonna esimehele Edgar Savisaarele Keila-Joal asuva suvila müümisest alla turuhinna. Kommenteerivad Ivar Tallo ja Margus Leivo. Lisad: Savisaare majatehing; Tehing; Savisaarel teine majaskandaal. Vt. samas: Hannes Krause, Jaanus Piirsalu. Aruanne võib näidata maja õiget hinda; Hannes Krause, Kristjan Jõevere. Savisaare omaga sarnane maja müügis 3 miljoniga

76 FR 76449 - Post Office Closing

Science.gov (United States)

2011-12-07

... the closing of the Spring Dale, West Virginia post office has been filed. It identifies preliminary... Postal Service's determination to close the Spring Dale post office in Spring Dale, West Virginia. The...

The Usage of E-Learning Model To Optimize Learning System In Higher Education by Using Dick and Carey Design Approach

Directory of Open Access Journals (Sweden)

Anak Agung Gde Satia Utama

2016-04-01

Full Text Available Nowadays many universities in the world apply technology enhanced learning in order to help learning activities. Due to the potentials technology enhanced learning offers, recent education using it and universities in particular are trying to apply it. One of the subjects of this research is The Accounting Department of Airlangga University in Surabaya. The idea of this research is to investigate the students about how they know deeply about e-learning system and learning objectives as a first step to conduct e-learning model. After the model completed, the next step is to prepare database learning. Entity Relationship Diagram (ERD can help to explain the model. The purpose of this research was done by using Dick and Carey Design Model. There are nine steps to conduct e-learning model. All steps can be categorized into three steps research: first is the introduction or empirical study, the next step is the design and the last is the feedback after the implementation. The methodology used in this research is using Qualitative Exploratory, by using questionnaire and interviews as data collection techniques. The analysis of the data shows organization requires information about e-learning content, user as a learning subject and information technology infrastructures. E-learning model as one of the alternative learning can help users to optimized learning.

Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials

Energy Technology Data Exchange (ETDEWEB)

Hansen, Jakob [KISTI,Daejeon 305-806 (Korea, Republic of); Yeom, Dong-han [Leung Center for Cosmology and Particle Astrophysics, National Taiwan University,Taipei 10617, Taiwan (China)

2015-09-07

We investigate the relation between the existence of mass inflation and model parameters of string-inspired gravity models. In order to cover various models, we investigate a Brans-Dicke theory that is coupled to a U(1) gauge field. By tuning a model parameter that decides the coupling between the Brans-Dicke field and the electromagnetic field, we can make both of models such that the Brans-Dicke field is biased toward strong or weak coupling directions after gravitational collapses. We observe that as long as the Brans-Dicke field is biased toward any (strong or weak) directions, there is no Cauchy horizon and no mass inflation. Therefore, we conclude that to induce a Cauchy horizon and mass inflation inside a charged black hole, either there is no bias of the Brans-Dicke field as well as no Brans-Dicke hair outside the horizon or such a biased Brans-Dicke field should be well trapped and controlled by a potential.

Ruum peaks olema taustaks inimeste mõtetele ja kulgemistele / Mari Koger

Index Scriptorium Estoniae

Koger, Mari

2008-01-01

Autor oma seisukohtadest ja taotlustest sisekujunduses - isikupärast, viimistletusest, avatud voolavast ruumist, stiilide kontrastist ja vanade asjade väärtustamisest. Mari Koger peab koos Taavi Aunrega sisearhitektuuribürood Boom

Maja "Moby Dick" = House Moby Dick / Jyrki Tasa

Index Scriptorium Estoniae

Tasa, Jyrki

2004-01-01

2003. a. valminud eramu projekteeris arhitekt Jyrki Tasa. Kivist trepp ja terasest sild viivad teisel korrusel valges seinas asuva peasissekäigu juurde. Talveaed ulatub läbi kahe korruse. Ruume liidavad ka kolm läbipaistvast klaasist ja terasest silda. Fassaadid on kaetud peamiselt vineeriga ning männilattide ja -laudadega. I, II, III korruse plaan, lõige, 3 välis- ja 7 sisevaadet

Journal of Biosciences | Indian Academy of Sciences

Indian Academy of Sciences (India)

Home; Journals; Journal of Biosciences. DALE JAMIESON. Articles written in Journal of Biosciences. Volume 43 Issue 1 March 2018 pp 3-8 Commentary. Liberating primatology · SINDHU RADHAKRISHNA DALE JAMIESON · More Details Abstract Fulltext PDF ...

Heinrich Dieter Holland (1927-2012)

Science.gov (United States)

Turekian, Karl K.

2012-08-01

Heinrich Dieter "Dick" Holland, who died on 21 May 2012, was responsible for major advances across several fields of geochemistry. He was born on 27 May 1927 and died just short of his 85th birthday. How Dick became a geochemist is an interesting story in itself. I first met Dick when we shared an office as graduate students at Columbia University in New York. He had attended Princeton University in New Jersey and graduated in 1946 with a chemistry major. He had arrived in the United States with his family from Germany in 1940. The family was of Jewish origin, and although Dick and his relatives were not strict practitioners, their fate in Hitler's Germany, dictated by the family's ancestry, would have been undesirable. Dick and his brother first went to England in 1939 to escape the future horrors that were sure to await them if they had remained in Germany. After their parents escaped to the Dominican Republic, Dick and his brother joined them there. With the help of friends, the family came to the United States from the Dominican Republic in 1940 (it was not unusual for immigrants to first come to a landing spot in the western hemisphere prior to admission to the United States).

77 FR 61663 - Endangered and Threatened Wildlife and Plants; Determination of Endangered Species Status for the...

Science.gov (United States)

2012-10-10

..., Bullock, Butler, Coffee, Conecuh, Covington, Crenshaw, Dale, Escambia, Geneva, Henry, Houston, Monroe, and... detritus (disintegrated organic debris), algae, diatoms, and bacteria (Strayer et al. 2004, pp. 430-431... Choctawhatchee.. Geneva, Coffee, AL Historical and Current. Dale, Pike, Barbour. Flat Creek Choctawhatchee...

Optimizing the Sustainment of U.S. Army Weapon Systems

Science.gov (United States)

2016-03-17

Dale Carnegie , Fellowship, etc.) NA None of the above OPTIMIZING SUSTAINMENT OF ARMY SYSTEMS 36 Question 11: Army Civilian Education System...Darden, Dale Carnegie , Fellowship, etc.) None of the above 11. Army Civilian Education System (check all that apply) Action Officer Development Course

Een wandelend woordenboek heeft nog geen talenknobbel

NARCIS (Netherlands)

dr Marianne Boogaard; M. Jansen

2014-01-01

Wetenschappelijk hoofdstuk in: een wandelend woordenboek heeft nog geen talenknobbel. In W. Daniëls (red.) Verhalen over taal. 150 jaar Van Dale. De Dikke Van Dale speelt al anderhalve eeuw een belangrijke rol in de Nederlandse taalcultuur. De veranderende betekenissen van woorden als burgemeester,

Root Cause Investigation Best Practices Guide

Science.gov (United States)

2014-05-30

Engineering Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania, April 1997 A-1 Appendix A. Case Study A.1 Type B Reaction Wheel...Ricardo Gonzalez ricardo.gonzalez@baesystem s.com BAE Systems Dale Gordon dale.gordon@rocket.com Rocket Chuck Gray Chuckg@fescorp.com Fescorp Luigi Greco

Brane dynamics in the Randall-Sundrum model, inflation and graceful exit

International Nuclear Information System (INIS)

Bhattacharya, Somdatta; Choudhury, Debajyoti; Jatkar, Dileep P; Sen, Anjan Ananda

2002-01-01

We study the averaged action of the Randall-Sundrum model with a time-dependent metric ansatz. It can be reformulated in terms of a Brans-Dicke action with time-dependent Newton's constant. We show that the physics of the early universe, particularly inflation, is governed by the Brans-Dicke theory. The Brans-Dicke scalar, however, quickly settles to its equilibrium value and decouples from the post-inflationary cosmology. The deceleration parameter is negative to start with but changes sign before the Brans-Dicke scalar settles to its equilibrium value. Consequently, the brane metric smoothly exits inflation. We have also studied the slow-roll inflation in our model and investigated the spectra of the density perturbation generated by the radion field and find them consistent with the current observations

77 FR 29963 - Request for Approval of a New Information Collection

Science.gov (United States)

2012-05-21

... Financial Officer Request for Approval of a New Information Collection AGENCY: Office of the Chief Financial.... FOR FURTHER INFORMATION CONTACT: Contact Dale Theurer, Office of the Chief Financial Officer, Fiscal... may be sent to Dale Theurer, Office of the Chief Financial Officer, Debt and Credit Policy Division, U...

Readability: Blind Faith in Numbers?

Science.gov (United States)

McConnell, Campbell

1983-01-01

The Flesch reading formula is questioned as being appropriate for evaluating college economics textbooks. The Dale-Chall, Modified Dale-Chall, Fry, and Flesch formulas were used to evaluate nine introductory textbooks. There was little or no consistency in either the absolute reading levels or the rank orderings. (Author/AM)

Evaluation of three cultivars of sweet sorghum as feedstocks for ethanol production in the Southeast United States

Directory of Open Access Journals (Sweden)

Daniel E. Ekefre

2017-12-01

Full Text Available Sweet sorghum has become a promising alternative feedstock for biofuel production because it can be grown under reduced inputs, responds to stress more efficiently than traditional crops, and has large biomass production potential. A three-year field study was conducted to evaluate three cultivars of sweet sorghum as bioenergy crops in the Southeast United States (Fort Valley, Georgia: Dale, M81 E and Theis. Parameters evaluated were: plant density, stalk height, and diameter, number of nodes, biomass yield, juice yield, °Bx, sugar production, and theoretical ethanol yields. Yields were measured at 85, 99, and 113 days after planting. Plant fresh weight was the highest for Theis (1096 g and the lowest for Dale (896 g. M81 E reported the highest stalk dry weight (27 Mg ha−1 and Theis reported the lowest (21 Mg ha−1. Theis ranked the highest °Bx (14.9, whereas M81 E was the lowest (13.2. Juice yield was the greatest for M81 E (10915 L ha−1 and the lowest for Dale (6724 L ha−1. Theoretical conservative sugar yield was the greatest for Theis (13 Mg ha−1 and the lowest for Dale (9 Mg ha−1. Theoretical ethanol yield was the greatest for Theis (7619 L ha−1 and the lowest for Dale (5077 L ha−1.

The Effectiveness of the Smog Index in Determining the Reading Levels of Business and Distributive Education Texts.

Science.gov (United States)

Schultheis, Robert A.; Anderson, Roberta

1982-01-01

McLaughlin's Smog Index was compared to the Dale-Chall formula for the determination of reading levels of 48 textbooks in business and distributive education. A Modified Smog Index proved a valid substitute for the Dale-Chall formula when used to evaluate the reading levels of business and distributive education narrative. (Author/CT)

The Readability of an Unreadable Text.

Science.gov (United States)

Gordon, Robert M.

1980-01-01

The Dale-Chall Readability Formula and the Fry Readability Graph were used to analyze passages of Plato's "Parmenides," a notoriously difficult literary piece. The readability levels of the text ranged from fourth to eighth grade (Dale-Chall) and from sixth to tenth grade (Fry), indicating the limitations of the readability tests. (DF)

Dale Reed with X-38 and a Subscale Model Used in Test Program

Science.gov (United States)

1997-01-01

Dale Reed, a NASA engineer who worked on the original lifting-body research programs in the 1960s and 1970s, stands with a scale-model X-38 that was used in 1995 research flights, with a full-scale X-38 (80 percent of the size of a potential Crew Return Vehicle) behind him. The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by NASA will be used on the X-38 thermal tiles to make them more durable than those used on the space

Obituary: Richard B. Dunn, 1927-2005

Science.gov (United States)

Keil, Stephen L.; Dooling, David

2007-12-01

Dr. Richard B. Dunn, astronomer emeritus at the National Solar Observatory, died of a heart attack on September 29, 2005. He was recognized as one of the foremost experimental solar physicists. His innovative designs for telescopes and instruments led to many important discoveries in solar physics. Born in Baltimore, Maryland, in 1927 and raised in Minneapolis, Minnesota, Dick's parents were Dr. Halbert L. Dunn and Katherine Brandner. Halbert (MD, Ph.D., F.A.P.H.A.) was an physician who became Chief of the National Office of Vital Statistics, Public Health Service. He published a paper "High Level Wellness for Man and Society" that became the founding paper of the field of wellness health care. After their divorce in 1942, Katherine moved to New York and became a social worker. Dick had two older brothers who died before him, Halbert (born in 1921, who became a civil engineer) and Robert (born in 1924, who became an architect). Dick earned a BS in mechanical engineering and an MS in astronomy at the University of Minnesota. At the end of World War II he served in the United States Army in Japan. For his master's degree, Dick undertook the design and construction of a Lyot-type birefringent filter for observations of solar prominences. This early work led to his acceptance at Harvard, where Professor Donald Menzel encouraged him to continue his work with the 15-inch Cambridge telescope. In 1951 he conducted part of his doctoral thesis work at the fledgling Sacramento Peak Observatory in southern New Mexico. The observatory director, Dr. John Evans, was impressed with Dick's outstanding instrumental talents and invited him to join as one of the first scientific staff members. During his first few years at Sac Peak, Dick developed two more birefringent filter systems including one with an integrated coronagraph. With this system, he produced the best prominence and spicule observations ever obtained. Dick's career was dedicated to obtaining solar observations of the

History of Fuel Cell R&D at Fort Belvoir, Virginia

Science.gov (United States)

2008-04-01

J. Armstrong, Dick Belt, Walt Taschek, Milt Jakola, Bob Chapman, Bill Carlton and Don Fetterman . The primary effort was fuel cells but Stirling...Kezer, Ed Gillis, Don Fetterman , Dick Belt, John Orth (Chief), Oscar Cleaver (Technical Director), Walter Taschek, Bob Trader, & Marshall (Jack

Diclofenac Potassium Transdermal Patches Using Natural Rubber Latex Biomembranes as Carrier

Directory of Open Access Journals (Sweden)

Natan Roberto de Barros

2015-01-01

Full Text Available The aim of this study was to design a compound transdermal patch containing diclofenac potassium (Dic-K using natural rubber latex (NRL biomembrane. The NRL from Hevea brasiliensis is easily manipulated and low cost and presents high mechanical resistance. It is a biocompatible material which can stimulate natural angiogenesis and is capable of adhering cells on its surface. Recent researches have used the NRL for Transdermal Drug Delivery Systems (TDDSs. Dic-K is used for the treatment of rheumatoid arthritis and osteoarthritis and pain relief for postoperative and posttraumatic cases, as well as inflammation and edema. Results showed that the biomembrane can release Dic-K for up to 216 hours. The kinetics of the Dic-K release could be fitted with double exponential function. X-ray diffraction and Fourier Transform Infrared (FTIR spectroscopy show some interaction by hydrogen bound. The results indicated the potential of the compound patch.

What minimum number of fractions is required with high dose-rate remote afterloading; and reply

International Nuclear Information System (INIS)

Orton, C.G.

1987-01-01

The author presents 'a more rigorous application of the linear quadratic model for protracted radiotherapy than Dale (1985)' and demonstrates that considerably fewer than 17 fractions are needed, a conclusion particularly relevant to treatment of cancer of the cervix. Dale's reply is based on the tenet that Orton has misquoted the use of the damage repair constants. (UK)

Quantum dot lattice as nano-antenna for collective spontaneous emission

NARCIS (Netherlands)

Mokhlespour, S.; Haverkort, J.E.M.; Slepyan, G.Y.; Maksimenko, S.A.; Hoffmann, A.; Maffucci, A.; Maksimenko, S.A.

2016-01-01

We present a theory for the collective spontaneous emission of timed Dicke states in a periodic 2D-array of quantum dots (QDs) coupled by dipoledipole (d-d) interactions. The master equation is first reformulated with respect to the timed Dicke basis. As a result, we obtain simple analytical

Smart Power: The United States, Iran, and a Nuclear Deal

Science.gov (United States)

2014-05-22

87Katzman, The Iran Sanctions Act (ISA), 1. 88Robert J. Einhorn, “Solving the Iranian Nuclear Puzzle,” Arms Control Association briefing, Carnegie ...114Catherine Dale , Operation Iraqi Freedom: Strategies, Approaches, Results, and Issue for Congress (Washington, DC: Congressional Research Service...fire-on-u-s-drone/ (accessed on September 28, 2013). Dale , Catherine. Operation Iraqi Freedom: Strategies, Approaches, Results, and Issue for

Determination of Love- and Rayleigh-Wave Magnitudes for Earthquakes and Explosions and Other Studies

Science.gov (United States)

2012-12-30

09-C-0012 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 62601F 6. AUTHOR(S) Jessie L. Bonner, Anastasia Stroujkova, Dale Anderson, Jonathan...AND RAYLEIGH-WAVE MAGNITUDES FOR EARTHQUAKES AND EXPLOSIONS Jessie L. Bonner, Anastasia Stroujkova, and Dale Anderson INTRODUCTION Since...MAXIMUM LIKELIHOOD ESTIMATION: APPLICATION TO MIDDLE EAST EARTHQUAKE DATA Anastasia Stroujkova and Jessie Bonner Weston Geophysical Corporation

Testing Timescales for Rhythms Recorded in the 2.5 Ga Banded Iron Formation of the Dales Gorge Member (Brockman Iron Formation, Hamersley Group, Australia)

Science.gov (United States)

Hinnov, L. A.; de Oliveira Carvalho Rodrigues, P.; Franco, D.

2017-12-01

The classic, Superior-type banded iron formation (BIF) of the Precambrian Dales Gorge Member (DGM) of the Brockman Iron Formation, Hamersley Basin, Western Australia consists of a succession of micro- (millimeter-scale) and meso- (centimeter to decimeter-scale) bands of primarily iron-silica chemical sediment alternations, separated into macro- (meter to decameter-scale) bands by shales (1). Here, we present a time-frequency analysis of a gray-scale scan of the DGM "type section core" Hole 47A with small contributions from Hole EC10 (1) to provide a comprehensive characterization of banding patterns and periodicity throughout the 140 m section. SHRIMP zircon ages (2) indicate that the DGM was deposited over approximately 30 myr during the Archean-Proterozoic transition just prior to the Great Oxidation Event. This suggests that the banding patterns recorded Milankovitch cycles, although with orbital-rotational parameters significantly different from present-day due to Earth's tidal dissipation and chaotic episodes in the Solar System since 2.5 Ga. Banding patterns change systematically within the formation in response to slowly varying environmental conditions, which have been interpreted previously to be related to sea level change and basin evolution (3). Researchers, including (2), have questioned the 30 myr duration, suggesting instead that the micro-bands may be annual in scale. This would indicate a much shorter duration of less than 150 kyr for the DGM. In an attempt to determine whether Milankovitch cycles could have generated the meso-band patterns, we present detailed studies of BIF0 and BIF12, which typify the marked changes in meso-banding along the section. Objective procedures are also applied, including ASM (4) and TIMEOPT (5) to test for a range of potential alternative timescales assuming orbital-rotational parameter values modeled for 2.5 Ga. References: (1) Trendall, A.K., Blockley, J.G., GSWA Ann. Rep. 1967, 48, 1968; (2) Trendall, A.K., et al

A question mark on the equivalence of Einstein and Jordan frames

Energy Technology Data Exchange (ETDEWEB)

Banerjee, Narayan [Department of Physical Sciences, Indian Institute of Science Education and Research - Kolkata, West Bengal 741246 (India); Majumder, Barun, E-mail: barunbasanta@iitgn.ac.in [Department of Physics, Montana State University, Bozeman, MT 59717 (United States); Department of Physics, IIT Gandhinagar, Ahmedabad (India)

2016-03-10

With an explicit example, we show that Jordan frame and the conformally transformed Einstein frames clearly lead to different physics for a non-minimally coupled theory of gravity, namely Brans–Dicke theory, at least at the quantum level. The example taken up is the spatially flat Friedmann cosmology in Brans–Dicke theory.

Using Formative Assessment to Facilitate Learner Self-Regulation: A Case Study of Assessment Practices and Student Perceptions in Hong Kong

Science.gov (United States)

Jing Jing, Ma

2017-01-01

One of the key aims of formative assessment in higher education is to enable students to become self-regulated learners (Nicol & Macfarlane-Dick, 2006). Based on Nicol and Macfarlane-Dick's (2006) framework, this exploratory study investigates which formative assessment practices proposed by them were used by one college EFL writing teacher to…

A question mark on the equivalence of Einstein and Jordan frames

Directory of Open Access Journals (Sweden)

Narayan Banerjee

2016-03-01

Full Text Available With an explicit example, we show that Jordan frame and the conformally transformed Einstein frames clearly lead to different physics for a non-minimally coupled theory of gravity, namely Brans–Dicke theory, at least at the quantum level. The example taken up is the spatially flat Friedmann cosmology in Brans–Dicke theory.

TA53:19 Reverb Chamber Quick-Look

Energy Technology Data Exchange (ETDEWEB)

Bishofberger, Kip A. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

2016-05-19

Within Building 19 of TA-53, a screen room has been evaluated for use as a reverb chamber (with deep gratitude to Dale Dalmas and Greg Dale for their assistance). With minimal additional sealing of the chamber, we expect the Q to increase even more, and thus field levels for the same RF source power. Future studies need to determine leakage field levels, which will define maximum achievable field levels.

Query 3; A Data Base Inquiry System Description and User’s Tutorials.

Science.gov (United States)

1980-03-01

since Query 3 exists on the ARPANET. These references include: Defense Communications Agency Report NIC 45601, ARPANET Resource Handbook, October 1978...34 T"abular ok:m dIR " biddle dale england fox gridley halsey harry e. yarnell horne josephus daniels jouett leahy reeves richmond k. turner sterett...the terminal, "dwight d. eise... nimitz ainsworth fox reeves valdez dale biddle miller pharris richard e. byrd texas conygham semmes goldsborouqh query

Exactly soluble models for surface partition of large clusters

International Nuclear Information System (INIS)

Bugaev, K.A.; Bugaev, K.A.; Elliott, J.B.

2007-01-01

The surface partition of large clusters is studied analytically within a framework of the 'Hills and Dales Model'. Three formulations are solved exactly by using the Laplace-Fourier transformation method. In the limit of small amplitude deformations, the 'Hills and Dales Model' gives the upper and lower bounds for the surface entropy coefficient of large clusters. The found surface entropy coefficients are compared with those of large clusters within the 2- and 3-dimensional Ising models

Brans-Dicke wormhole revisited

International Nuclear Information System (INIS)

Bhattacharya, Amrita; Nandi, Kamal K; Nigmatzyanov, Ilnur; Izmailov, Ramil

2009-01-01

A basic constraint to be satisfied by a Brans class I solution for being a traversible wormhole is derived. It is argued that the solution could be a wormhole analog of the Horowitz-Ross naked black hole. It is further demonstrated that the wormhole is traversible only 'in principle', but not in practice. Using a recently proposed measure of total gravitational energy inside a static wormhole configuration, it is shown that the wormhole contains the repulsive gravity required for the defocussing of orbits at the throat.

Reformpædagogikken revitaliseret

DEFF Research Database (Denmark)

Petersen, Benedikte Vilslev; Krogh_Jespersen, Kirsten; Kirkegaard, Preben Olund

2014-01-01

Bogen er en introduktion til Dales norske udgivelser fra 1999 til 2011 samlet under tre hovedoverskrifter: 'Skolereformer i videnssamfundet', 'Fællesskolen - fra reproduktion af social ulighed til skolefaglig læring for alle' og 'Uddannelsesvidenskab og pædagogik'. I indledningen......Bogen er en introduktion til Dales norske udgivelser fra 1999 til 2011 samlet under tre hovedoverskrifter: 'Skolereformer i videnssamfundet', 'Fællesskolen - fra reproduktion af social ulighed til skolefaglig læring for alle' og 'Uddannelsesvidenskab og pædagogik'. I indledningen...

Quantum biological gravitational wave detectors

International Nuclear Information System (INIS)

Kopvillem, U.Kh.

1985-01-01

A possibility of producing biological detectors of gravitational waves is considered. High sensitivity of biological systems to outer effects can be ensured by existence of molecule subgroups in Dicke states. Existence of clusters in Dicke state-giant electric dipoles (GED) is supposed in the Froehlich theory. Comparison of biological and physical detectors shows that GED systems have unique properties for detection of gravitational waves if the reception range is narrow

Quantum cosmology with effects of a preferred reference frame

International Nuclear Information System (INIS)

Ghaffarnejad, Hossein

2010-01-01

Recently, we presented a gravity model by generalizing the Brans-Dicke theory which is suitable for studying the metric signature transition dynamics without using an imaginary time parameter. Adding a suitable scalar potential described in terms of the Brans-Dicke scalar field 'Φ-tilde, this alternative theory is used to study the Wheeler-DeWitt approach of quantum cosmology. We assumed that the universe is defined in a flat Robertson-Walker metric with Lorentzian signature. In that case, the Wheeler-DeWitt wavefunctional is obtained as two-dimensional quantum harmonic oscillator convergent polynomials for both of the choices of positive and negative values of the Brans-Dicke parameter. Here we choose a preferred reference frame with a time coordinate of 'γ' which relates to time of cosmological free falling observer 't' as 'dt= Φ-tilde(γ)dγ'.

A High Performance Frequency Standard and Distribution System for Cassini Ka-Band Experiment

Science.gov (United States)

2005-08-01

Orthogonal Polarization In Anisotropic Dielectric Resonators”, Proceedings of the 2002 IEEE International Frequency Control Symposium , pp. 553-558...2002. [9] G. J. Dick, Rabi T. Wang, Robert Tjoelker, “Design and Progress Report for Compact Cryocooled Sapphire Oscillator "VCSO"”, Proc. 2005 Joint...IEEE FCS/ PTTI. [10] R. Basu, G. J. Dick, Rabi T. Wang,” Novel Design of an All- Cryogenic RF Pound Circuit “,Proc. 2005 Joint IEEE FCS/ PTTI

Obituary: Richard D. Schwartz (1941-2011)

Science.gov (United States)

Wilking, Bruce

2011-12-01

Richard D. Schwartz, Professor Emeritus of Astronomy, died at his home in Sequim, WA, after a nearly 3 year battle against pancreatic cancer. Richard was born in Pretty Prairie, Kansas. He was active in sports and band and graduated in 1959. After completing a BS at Kansas State, and a Master's degree in Divinity at Union Seminary in NY, he further studied astrophysics, receiving his doctorate from University of Washington in 1973. When Dick arrived at the University of Missouri-St. Louis in 1975, he was the only astronomer in the Department of Physics. He built the astronomy program and initiated the B.S. in physics with an astrophysics option that the majority of physics majors choose. Dick was a wonderful teacher and provided outstanding leadership to the campus. He designed and provided oversight on the construction of the campus observatory that was completed in 1981. Since that time the observatory has served as both a teaching and research facility. It is also used for monthly public open houses that draw hundreds of people annually to the campus to view the moon, stars, and planets. Upon his retirement in 2003, the Board of Curators approved naming the campus observatory the "Richard D. Schwartz Observatory" in honor of his distinctive service to the University of Missouri-St. Louis. Just as important as Dick's service to promote public interest in astronomy was his effort to make the campus observatory a research facility. Dick equipped and maintained the observatory with state-of-art detectors that allowed students to get their first taste of scientific research. From 1991-2003, he managed the campus program for the NASA/Missouri Space Grant Consortium and mentored over 30 research students in projects at the observatory. Some of the results have been published in astronomical journals. Many of those students went on to graduate schools and several have achieved tenure and distinction at major universities. In addition to Dick's service to the University

Fungsi Bangunan Dokwi Vam dan Kembu Vam Bagi Suku Yali dalam Novel Penguasa-penguasa Bumi Karya Don Richardson

Directory of Open Access Journals (Sweden)

Ummu Fatimah Ria Lestari

2016-04-01

Full Text Available This study discusses the function of the building of Dokwi Vam and Kembu Vam contained in the novel-Sovereign Ruler of the Earth works Don Richardson. In general, this novel tells the story of the life of Stan Dale and Yali tribe. Stan Dale is a missionary who served in Papua. He struggled to introduce Christianity to the Yali tribe. This study uses the description of the technical literature. This research resulted in a description of the function of the building of Dokwi Vam and Kembu Vam contained in the novel Lord of-Ruler of the Earth works Don Richardson. Dokwi Vam used as a museum (where the old stuff to worship as they still follow animism, while the Kembu Vam serves as a temple / animism worship in Yali tribe. Penelitian ini membahas tentang fungsi bangunan Dokwi Vam dan Kembu Vam yang terdapat dalam novel Penguasa-Penguasa Bumi karya Don Richardson. Secara umum, novel ini bercerita tentang kehidupan Stan Dale dan suku Yali. Stan Dale adalah seorang missionaris yang melayani di Tanah Papua. Ia berjuang untuk memperkenalkan agama Nasrani kepada suku Yali. Penelitian ini menggunakan metode deskripsi dengan teknik studi pustaka. Penelitian ini menghasilkan deskripsi tentang fungsi bangunan Dokwi Vam dan Kembu Vam yang terdapat dalam novel Penguasa-Penguasa Bumi karya Don Richardson. Dokwi Vam digunakan sebagai museum (tempat barang-barang kuno untuk penyembahan karena mereka masih menganut kepercayaan animisme, sedangkan Kembu Vam berfungsi sebagai rumah peribadatan/penyembahan dalam kepercayaan animisme suku Yali.

Quantifying linguistic coordination

DEFF Research Database (Denmark)

Fusaroli, Riccardo; Tylén, Kristian

task (Bahrami et al 2010, Fusaroli et al. 2012) we extend to linguistic coordination dynamical measures of recurrence employed in the analysis of sensorimotor coordination (such as heart-rate (Konvalinka et al 2011), postural sway (Shockley 2005) and eye-movements (Dale, Richardson and Kirkham 2012......). We employ nominal recurrence analysis (Orsucci et al 2005, Dale et al 2011) on the decision-making conversations between the participants. We report strong correlations between various indexes of recurrence and collective performance. We argue this method allows us to quantify the qualities...

Study on the technique for precision measurement of density of SiO_2 foam shells

International Nuclear Information System (INIS)

Ma Xiaojun; Gao Dangzhong; Meng Jie

2013-01-01

The measuring method based on vertical scanning interference and combined with the relation between refraction index and density of SiO_2 foam shells is introduced, and the relation is analyzed according to formulas of Lorentz-Lorenz and Gladstone-Dale. The experimental result and measuring uncertainty evaluation indicate that the precision measurement of density of low density SiO_2 foam shells can be realized by using the vertical scanning interference technique and combining with Gladstone and Dale analysis method, and the measuring uncertainty is about 5%. (authors)

Some problems with extended inflation

International Nuclear Information System (INIS)

Weinberg, E.J.

1989-01-01

The recently proposed extended inflation scenario is examined. Upper bounds on the Brans-Dicke parameter ω are obtained by requiring that the recovery from the supercooled regime be such that the presently observed Universe could have emerged. These bounds are well below the present-day experimental limits, implying that one must use models which have a potential to fix the present value of the Brans-Dicke-like scalar field. The implications for extended inflation in such models are discussed

Colloidal Structure of Heavy Crudes and Asphaltene Soltutions Structure colloïdale des bruts lourds et des suspensions d'asphaltènes

Directory of Open Access Journals (Sweden)

Barre L.

2006-12-01

concentration fluctuations. It exists in the diluted suspension regions more or less extended, where the asphaltene concentration is greater than the average asphaltene concentration. Cryo-scanning electron microscopy has confirmed the system inhomogeneity. A two phase system was clearly highlighted. The flocculation process was followed during n-heptane addition by scattering measurements and microscopy observations. Small angle X-ray scattering (SAXS appears as a powerful tool for non-fractionated systems, as crude oil or other heavy derivatives. Density fluctuations were observed for a vacuum residue. L'industrie pétrolière est souvent confrontée a des problèmes industriels importants liés, entre autre, à la présence d'une forte concentration d'asphaltènes dans les fluides traités. Une meilleure connaissance de la composition de ces molécules et de l'évolution de leur structure colloïdale en solution ou dans leur milieu naturel est d'une grande importance pour mieux comprendre les mécanismes mis en jeu, et ainsi, pouvoir agir et limiter les problèmes rencontrés. Les asphaltènes correspondent à la fraction insoluble dans le n-heptane. Les molécules solubilisées dans l'alcane sont appelées maltènes et peuvent à leur tour être fractionnées par chromatographie en phase liquide; on obtient alors trois nouvelles fractions appelées résines, aromatiques et saturées. La plupart des travaux de recherche réalisés sur ces molécules complexes concernent la détermination de la composition chimique obtenue à l'aide de diverses techniques d'analyse telles la spectroscopie infrarouge et la résonance magnétique nucléaire. En revanche, peu d'informations sur la macrostructure colloïdale des asphaltènes sont disponibles dans la littérature. La détermination de la masse moléculaire a été le premier objectif : plusieurs méthodes, comme l'osmométrie à tension de vapeur, ont été appliquées. La conclusion principale de ces déterminations est la grande

Predicted allowable doses to normal organs for biologically targeted radiotherapy

International Nuclear Information System (INIS)

O'Donoghue, J.A.; Wheldon, T.E.; Western Regional Hospital Board, Glasgow

1988-01-01

The authors have used Dale's extension to the ''linear quadratic'' (LQ) model (Dale, 1985) to evaluate ''equivalent doses'' in cases involving exponentially decaying dose rates. This analysis indicates that the dose-rate effect will be a significant determinant of allowable doses to organs such as liver, kidney and lung. These organ tolerance doses constitute independent constraints on the therapeutic intensity of biologically targeted radiotherapy in exactly the same way as for conventional external beam radiotherapy. In the context of marrow rescue they will in all likelihood constitute the dose-limiting side-effects and thus be especially important. (author)

Generation of density perturbations by inflation in scalar-tensor gravity theories

Science.gov (United States)

Seshadri, T. R.

1992-02-01

Density perturbations arising out of the quantum fluctuations in a Brans-Dicke field in the context of extended inflation have been studied. We have used a model in which the Brans-Dicke parameter varies with time. We find that the density perturbations are large in magnitude and have a scale invariant spectrum. The origin of these is discussed and it is shown that these place further constraints on the model. Address after 15 Octobr 1991: Department of Physics and Astrophysics, University of Delhi 110 007, India.

Rippled cosmological dark matter from a damped oscillating Newton constant

International Nuclear Information System (INIS)

Davidson, Aharon

2005-01-01

Let the reciprocal Newton 'constant' be an apparently non-dynamical Brans-Dicke scalar field damped oscillating towards its general relativistic VEV. We show, without introducing additional matter fields or dust, that the corresponding cosmological evolution averagely resembles, in the Jordan frame, the familiar dark radiation → dark matter → dark energy domination sequence. The fingerprints of our theory are fine ripples, hopefully testable, in the FRW scale factor; they die away at the general relativity limit. The possibility that the Brans-Dicke scalar also serves as the inflaton is favourably examined

Equivalence of Einstein and Jordan frames in quantized anisotropic cosmological models

Science.gov (United States)

Pandey, Sachin; Pal, Sridip; Banerjee, Narayan

2018-06-01

The present work shows that the mathematical equivalence of the Jordan frame and its conformally transformed version, the Einstein frame, so as far as Brans-Dicke theory is concerned, survives a quantization of cosmological models, arising as solutions to the Brans-Dicke theory. We work with the Wheeler-deWitt quantization scheme and take up quite a few anisotropic cosmological models as examples. We effectively show that the transformation from the Jordan to the Einstein frame is a canonical one and hence two frames furnish equivalent description of same physical scenario.

Geochemical implications of gabbro from the slow-spreading Northern Central Indian Ocean Ridge, Indian Ocean

Digital Repository Service at National Institute of Oceanography (India)

Ray, Dwijesh; Misra, S.; Banerjee, R.; Weis, D.

., 1989) and the dynamics of crystallization of plutonic rocks (Bloomer et al., 1989; Meyer et al., 1989). The recovery of gabbroic rocks is mostly restricted to major transform faults or fracture zones transecting mid-ocean ridges, e.g., Mid... gabbro of Indian Ocean Ridge System (Fig 1) is ODP leg 118 from SWIR (Dick et al., 2002; Coogan et al, 2001). Gabbro from Leg 179 (ODP Hole 735B from Atlantis II fracture zone, Dick et al., 2000) and Leg 179 (Hole 1105A) near Leg 118 have also been...

Demokraatia taganemine Venemaal / Dick Lugar

Index Scriptorium Estoniae

Lugar, Dick

2005-01-01

17. veebruaril USA Senatis esitatud Senati väliskomisjoni esimehe ettekanne, milles ta käsitles olukorda Venemaal, Venemaa katset sekkuda Ukraina valimistesse, toetust Gruusia separatistlikele regioonidele. Komisjoni esimehe sõnul peab USA jätkama Venemaale surve avaldamist, et seal hakkaks kehtima vaba ja õiglane poliitiline ning õiguslik süsteem

[The neurotransmision from the other side].

Science.gov (United States)

Sánchez García, Pedro

2010-01-01

The discovery of how neurons communicate, like the cracking of genetic code and the creation of the atomic bomb is one of the fundamental scientific development of the twentieth century. In this paper we described the history of scientific discovery of neurohumoral transmission against the backdrop of the two torld and the fascinating lives of several scientists whose work was affected by the social and political events in their time. The lives and history of the main protagonists Sir Henry Dale, Otto Loewi and Walter Cannon are reported here. Otto Lewi and William Felberg--as jews--were arrested by nazi troops and Otto Krayer--not a jew--for not accepting one universitary offer of nazu party. All of them, and many others, were compelled to migrate from Germany to Great Britain, where Sir Henry Dale helped them to continue their work and their lives. All this scientist played an important role in the work on chemical neurotransmission which finally cristalized in awarding the Nobel. Price--in 1936--to Otto Loewi and Sir Henry Dale, but not to Walter Cannon, in this case, for adopting a controversial theory. The role of Rockefeller Foundation in this history is also comtemplated.

Origin of density fluctuations in extended inflation

International Nuclear Information System (INIS)

Kolb, E.W.; Salopek, D.S.; Turner, M.S.

1990-01-01

We calculate both the curvature and isocurvature density fluctuations that arise due to quantum fluctuations in a simple model of extended inflation based upon the Jordan-Brans-Dicke theory. The curvature fluctuations that arise due to quantum fluctuations in the Brans-Dicke field in general have a non-scale-invariant spectrum and an amplitude that is cosmologically acceptable and interesting without having to tune any coupling constant to a very small value. The curvature perturbations that arise due to the Higgs field are subdominant. If there are other massless fields in the theory, e.g., an axion or an ilion, then isocurvature fluctuations arise in these fields too. Production of gravitational waves and the massless particles associated with excitations of the Brans-Dicke field are also discussed. Several attempts at more realistic models of extended inflation are also analyzed. The importance of the Einstein conformal frame in calculating curvature fluctuations is emphasized. When viewed in this frame, extended inflation closely resembles slow-rollover inflation with an exponential potential, and the usual formula for the amplitude of curvature perturbations applies directly

Origin of density fluctuations in extended inflation

International Nuclear Information System (INIS)

Kolb, E.W.; Salopek, D.S.; Turner, M.S.

1990-05-01

The density fluctuations (both curvature and isocurvature) that arise due to quantum fluctuations in a simple model of extended inflation based upon the Jordan-Brans-Dicke theory are calculated. Curvature fluctuations arise due to quantum fluctuations in the Brans-Dicke field, in general have a nonscale-invariant spectrum, and can have an amplitude that is cosmologically acceptable and interesting without having to tune any coupling constant to a very small value. The density perturbations that arise due to the inflation field are subdominant. If there are other massless fields in the theory, e.g., an axion or an ilion, then isocurvature fluctuations arise in these fields too. Production of gravitational waves and the massless particles associated with excitations of the Brans-Dicke field are also discussed. Several attempts at more realistic models of extended inflation are also analyzed. The importance of the Einstein conformal frame in calculating curvature fluctuations is emphasized. When viewed in this frame, extended inflation closely resembles slow-rollover inflation with an exponential potential and the usual formula for the amplitude of curvature perturbations applies

Four-wave mixing and six-wave mixing in a four-level confined atomic system

International Nuclear Information System (INIS)

Chang-Biao, Li; Yan-Peng, Zhang; Zhi-Qiang, Nie; Huai-Bin, Zheng; Mei-Zhen, Shi; Dong-Ning, Liu; Jian-Ping, Song; Ke-Qing, Lu

2009-01-01

We have investigated coexisting four-wave mixing and six-wave mixing (SWM) in ultra-thin, micrometre and long vapour cells. There exists competition between Dicke-narrowing features and polarization interference in the micrometre cell. The oscillation behaviour of SWM signal intensities and linewidths results from destructive interference. With a larger destructive interference, the SWM signal in ultra-thin cells shows a narrow spectrum, in contrast to the long cell case. Due to the Dicke-narrowing features, a narrow spectrum can be obtained, and such spectra can be used for high precision measurements and metrological standards. (classical areas of phenomenology)

Quantum state engineering in hybrid open quantum systems

Science.gov (United States)

Joshi, Chaitanya; Larson, Jonas; Spiller, Timothy P.

2016-04-01

We investigate a possibility to generate nonclassical states in light-matter coupled noisy quantum systems, namely, the anisotropic Rabi and Dicke models. In these hybrid quantum systems, a competing influence of coherent internal dynamics and environment-induced dissipation drives the system into nonequilibrium steady states (NESSs). Explicitly, for the anisotropic Rabi model, the steady state is given by an incoherent mixture of two states of opposite parities, but as each parity state displays light-matter entanglement, we also find that the full state is entangled. Furthermore, as a natural extension of the anisotropic Rabi model to an infinite spin subsystem, we next explored the NESS of the anisotropic Dicke model. The NESS of this linearized Dicke model is also an inseparable state of light and matter. With an aim to enrich the dynamics beyond the sustainable entanglement found for the NESS of these hybrid quantum systems, we also propose to combine an all-optical feedback strategy for quantum state protection and for establishing quantum control in these systems. Our present work further elucidates the relevance of such hybrid open quantum systems for potential applications in quantum architectures.

The gauge in general relativity

International Nuclear Information System (INIS)

Cohn, J.

1975-01-01

The view is taken that the field equations of General Relativity, without a definition of congruence of length and time intervals at different events, are without physical content. The possibility is explored that the customary Einstein field equations are to be used but with a different congruence definition than is customary. When these resulting equations are, in turn, expressed with the customary congruence, they comprise a new set of field equations physically not equivalent to either Einstein's or Brans-Dicke's formulations of general relativity. Similarities with Einstein's and Brans-Dicke's formulations are discussed, and the possibility of experimental confirmation of these new equations is also briefly considered. (author)

77 FR 21099 - Farm Credit Administration Board; Sunshine Act; Regular Meeting

Science.gov (United States)

2012-04-09

... March 8, 2012 B. New Business Operating and Strategic Business Planning--Final Rule C. Reports Quarterly... business. FOR FURTHER INFORMATION CONTACT: Dale L. Aultman, Secretary to the Farm Credit Administration...

Dicke states in multiple quantum dots

Science.gov (United States)

Sitek, Anna; Manolescu, Andrei

2013-10-01

We present a theoretical study of the collective optical effects which can occur in groups of three and four quantum dots. We define conditions for stable subradiant (dark) states, rapidly decaying super-radiant states, and spontaneous trapping of excitation. Each quantum dot is treated like a two-level system. The quantum dots are, however, realistic, meaning that they may have different transition energies and dipole moments. The dots interact via a short-range coupling which allows excitation transfer across the dots, but conserves the total population of the system. We calculate the time evolution of single-exciton and biexciton states using the Lindblad equation. In the steady state the individual populations of each dot may have permanent oscillations with frequencies given by the energy separation between the subradiant eigenstates.

Robert H Dicke – Physicist Extraordinaire

Indian Academy of Sciences (India)

next decade on fundamental studies on the quantum mechanical interaction of radiation ... For example, (i) They found that the gravitational redshift of the solar ... He started a company, Princeton Applied Research or PAR, to market lock-in.

Naskalnaja zhivopis - graffiti doistoritsheskih huliganov?

Index Scriptorium Estoniae

2006-01-01

Ameerika professor Dale Guthrie väidab oma uues raamatus "The Nature of Paleolitic Art", et kaljujoonised on suures osas eelajalooliste noorukite grafiti. Professori väide on esile kutsunud paleontoloogide kriitika

75 FR 54694 - Notice of Availability of a Supplemental Draft Environmental Impact Statement for the...

Science.gov (United States)

2010-09-08

... Counsel of Environmental Quality (CEQ) regulations implementing NEPA (40 CFR parts 1500 et seq.) and FRA's... and additions, which include a new Victorville passenger station option at Dale Evans Parkway, a rail...

77 FR 24709 - Farm Credit System Insurance Corporation Board; Regular Meeting

Science.gov (United States)

2012-04-25

... Presentation of 2011 Audit Results by External Auditor Clifton Larson Allen LLP Executive Session Executive Session of the FCSIC Board Audit Committee with the External Auditor Dated: April 19, 2012. Dale L...

75 FR 23600 - Final Flood Elevation Determinations

Science.gov (United States)

2010-05-04

... feet +571 upstream of the confluence with Millers Creek. Dale Hollow Lake (Wolf River) At the... upstream of the confluence with Spring Creek. Lake Cumberland Just upstream of the Wolf +760 Unincorporated...

La ‘pija de oro’ en Las aventuras del señor Maíz de Washington Cucurto. Algunas notas

Directory of Open Access Journals (Sweden)

Cristian Molina

2014-02-01

Full Text Available The present article consists in notes from research in progress. They address Washington Cucurto’s writing device with respect to the “negro”’s golden dick that the narrator/character Tyson Grande/Washington Cucurto/Norberto Vega implants into himself in Las aventuras del Señor Maíz (2005. We argue that such chirurgical and body prosthesis exhibits forces (in a Deleuzian sense which govern all of Cucurto’s/Vega’s production: social, economic, sexual and Latin American cultural forces. The golden dick is, then, a poetic condensation which exhibits the writing machine as a melancholic beast in whose body forces in struggle for literature become destabilized.

Scalar-metric and scalar-metric-torsion gravitational theories

International Nuclear Information System (INIS)

Aldersley, S.J.

1977-01-01

The techniques of dimensional analysis and of the theory of tensorial concomitants are employed to study field equations in gravitational theories which incorporate scalar fields of the Brans-Dicke type. Within the context of scalar-metric gravitational theories, a uniqueness theorem for the geometric (or gravitational) part of the field equations is proven and a Lagrangian is determined which is uniquely specified by dimensional analysis. Within the context of scalar-metric-torsion gravitational theories a uniqueness theorem for field Lagrangians is presented and the corresponding Euler-Lagrange equations are given. Finally, an example of a scalar-metric-torsion theory is presented which is similar in many respects to the Brans-Dicke theory and the Einstein-Cartan theory

Positron reemission microscopy

International Nuclear Information System (INIS)

Brandes, G.F.; Canter, K.F.; Mills, A.P. Jr.

1991-01-01

The positron reemission microscope (PRM), originally proposed by Hulett, Dale and Pendyala, operates on principles fundamentally different from those utilized in existing microscopes and offers sensitivity and contrast not available in conventional microscopes

76 FR 69793 - Qualification of Drivers; Exemption Applications; Vision

Science.gov (United States)

2011-11-09

... Michael Wayne Gilley William C. Miller Darrell Prather James Jaramillo One applicant, Robert J. Moore, Jr... federal government, state, or any political sub-division of the state. Jimmy Dale Johnson, II Wesley R...

CLIL activities by Liz Dale and Rosie Tanner

OpenAIRE

Simpson, Adam John

2012-01-01

Ever since David Marsh and Anne Maljers ushered in the era of CLIL in 1994, this new methodology has remained a source of hot debate in ELT. While many teachers are suspicious of or indeed resistant to the very notion of Content and Language Integrated learning, others view it as the future of language teaching. For those unfamiliar with the concept, CLIL is an approach which aims to marry the learning of content to the acquisition of an additional language, thus teaching both the subject and...

Drama in the Dale: Transformation through Community Drama

Science.gov (United States)

Ward, Julie; Mills, Helen Frances; Anderson, Alan

2013-01-01

During the winter of 2011-2012, Weardale, England, was the setting for an ambitious informal adult education project. In this rural area in the northeast part of the country, the local arts collective, Jack Drum Arts, established a community play project entitled "The Bonny Moorhen." This dramatic undertaking aimed to retell the story of…

'Drawing aside the curtain': natural childbirth on screen in 1950s Britain.

Science.gov (United States)

Al-Gailani, Salim

2017-09-01

This article recovers the importance of film, and its relations to other media, in communicating the philosophies and methods of 'natural childbirth' in the post-war period. It focuses on an educational film made in South Africa around 1950 by controversial British physician Grantly Dick-Read, who had achieved international fame with bestselling books arguing that relaxation and education, not drugs, were the keys to freeing women from pain in childbirth. But he soon came to regard the 'vivid' medium of film as a more effective means of disseminating the 'truth of [his] mission' to audiences who might never have read his books. I reconstruct the history of a film that played a vital role in teaching Dick-Read's method to both the medical profession and the first generation of Western women to express their dissatisfaction with highly drugged, hospitalized maternity care. The article explains why advocates of natural childbirth such as Dick-Read became convinced of the value of film as a tool for recruiting supporters and discrediting rivals. Along the way, it offers insight into the British medical film industry and the challenges associated with producing, distributing and screening a depiction of birth considered unusually graphic for the time.

Lendas üle dramaturgia / Olev Remsu

Index Scriptorium Estoniae

Remsu, Olev, 1947-

2004-01-01

Autor analüüsib Ken Kesey romaani ümbersünde teatrilaval ja kinolinal - esmalt Dale Wassermani samanimeliseks näidendiks (1963) ning seejärel Bo Goldmani ja Lawrence Haubeni filmistsenaariumiks (linastus 1975)

Cheney and Russia : useful hypocrisy? / Gwynne Dyer

Index Scriptorium Estoniae

Dyer, Gwynne

2006-01-01

Ilmunud ka: Molodjozh Estonii 19. mai lk. 8. USA topeltstandardite poliitika, asepresident Dick Cheney kriitika Venemaa ja heasoovlikkus Kasahstani suhtes. President Nursultan Nazarbajevi diktatuur ja USA nafta ning gaasihuvid

download full text

African Journals Online (AJOL)

Dale E. Zand (1997) argues that People once stood in awe of electricity, until ... in today's information-driven organizations: knowledge, trust, and power. ..... people's culture and resistance to anti-corruption efforts constitute the firmly fixed load.

77 FR 10606 - Qualification of Drivers; Exemption Applications; Vision

Science.gov (United States)

2012-02-22

... comments on-line. Privacy Act: Anyone may search the electronic form of all comments received into any of... (TX), Dale M. Cannon (OR), Jamie French (NC), Wayne H. Holt (UT), Billy R. Jefferies (WV), Carlos A...

Genetics Home Reference: Aicardi-Goutières syndrome

Science.gov (United States)

... C, Chandler KE, Chitayat DA, Collins AE, Sierra Corcoles C, Cordeiro NJ, Crichiutti G, Dabydeen L, Dale ... A, Schiffmann R, Scholl-Burgi S, Seal S, Shalev SA, Corcoles CS, Sinha GP, Soler D, Spiegel R, Stephenson ...

Ectoparasite infestation of free scavenging chickens reared under ...

African Journals Online (AJOL)

2009) of which about 99% are raised under the traditional backyard system of management, while 1 ..... including cost effectiveness of control strategies. ... Marketing System of Dale, Wonsho and Loka Abaya Weredas of SNNPRS. MSc thesis ...

Eesti NSV julgeolekukomitee esimees sõpru võitmas ja inimesi mõjustamas / Peep Pillak

Index Scriptorium Estoniae

Pillak, Peep, 1957-

2016-01-01

Hoiuraamatukokku jõudnud trükistest. ENSV KGB esimehe Karl Kortelaineni pühenduse ja allkirjaga trükisest. Tegemist on koopiaga Dale Carnegie raamatust "Kuidas võita sõpru ja mõjustada inimesi" vene keeles

USA terrorivastase sõja võtted Euroopa hambutu kriitika all / Ahto Lobjakas

Index Scriptorium Estoniae

Lobjakas, Ahto, 1970-

2006-01-01

Euroopa Nõukogu parlamentaarsel assambleel (ENPA) võeti vastu Dick Marty raporti alusel koostatud deklaratsioon, kus mõisteti hukka Euroopa Nõukogu liikmesriigid, kes olid kaasosalised terrorismis kahtlustavate isikute ebaseaduslikus kinnipidamises Euroopas

vegetation of the koobi fora region northeast of lake turkana

African Journals Online (AJOL)

Dale, I.R. & P.J. Greenway (1961). Kenya Trees and Shrubs. ... Holocene wet-dry transition recorded in palaeo-shorelines of Lake Turkana, northern. Kenya Rift. Earth and ... Integrated Project on Arid Lands Technical Paper. Number D-3.

ÉTUDE DE CAS : Nouvelles armes dans la guerre contre le ...

International Development Research Centre (IDRC) Digital Library (Canada)

12 janv. 2011 ... ... sous le sigle anglais IMCI (integrated management of childhood illness). .... moustiquaires ont donc pris la forme d'une campagne de marketing social en ... Dale, pour le compte de la Division des communications du CRDI.

High-Power Collective Charging of a Solid-State Quantum Battery

Science.gov (United States)

Ferraro, Dario; Campisi, Michele; Andolina, Gian Marcello; Pellegrini, Vittorio; Polini, Marco

2018-03-01

Quantum information theorems state that it is possible to exploit collective quantum resources to greatly enhance the charging power of quantum batteries (QBs) made of many identical elementary units. We here present and solve a model of a QB that can be engineered in solid-state architectures. It consists of N two-level systems coupled to a single photonic mode in a cavity. We contrast this collective model ("Dicke QB"), whereby entanglement is genuinely created by the common photonic mode, to the one in which each two-level system is coupled to its own separate cavity mode ("Rabi QB"). By employing exact diagonalization, we demonstrate the emergence of a quantum advantage in the charging power of Dicke QBs, which scales like √{N } for N ≫1 .

Superradiance from crystals of molecular nanomagnets.

Science.gov (United States)

Chudnovsky, E M; Garanin, D A

2002-10-07

We show that crystals of molecular nanomagnets can exhibit giant magnetic relaxation due to the Dicke superradiance of electromagnetic waves. Rigorous theory is presented that combines superradiance with the Landau-Zener effect.

South Asia | Page 199 | IDRC - International Development Research ...

International Development Research Centre (IDRC) Digital Library (Canada)

Language French ... Ruth Meinzen-Dick (Senior Research Fellow, International Food Policy Research ... This publication explores the meaning of agriculture and guides the reader into new territory, where food, ecology, and culture converge.

77 FR 71472 - Agency Information Collection Activities: Requests for Comments; Clearance of Renewed Approval of...

Science.gov (United States)

2012-11-30

... Administration to measure management objectives and analyze customer feedback for ISO-9001. DATES: Written... to customer satisfaction. The Glenn Dale Distribution Center collects the customer feedback for Aviation System Standards Quality Management objectives. To accomplish the research objectives, Customers...

Liberating primatology

Indian Academy of Sciences (India)

SINDHU RADHAKRISHNA1 2 DALE JAMIESON2. School of Natural Sciences and Engineering, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India; Environmental Studies Department, New York University, New York, NY 10003-6653, USA ...

GUIDELINE Guideline for the diagnosis and management of ...

African Journals Online (AJOL)

Inkosi Albert Luthuli Central Hospital, Durban; and Department of Paediatrics and .... Dale RC, de Sousa C, Chong WK, Cox TC, Harding B, Neville BG. ... Mikaeloff Y, Caridade G, Tardieu M, Suissa S. Effectiveness of early beta interferon on ...

How Alzheimer's Changes the Brain

Medline Plus

Full Text Available ... FightingAlzheimers 597,278 views 9:37 Reversing Alzheimer’s Disease- Dr. Dale Bredesen, MD - Duration: 1:13:27. Silicon ... 5:15 5 Signs You'll Get Alzheimer's Disease - Dr. Russell Blaylock Offers Crucial Advice. - Duration: 33:27. ...

Julge unistada! / Timo Rein, Martin Sookael

Index Scriptorium Estoniae

Rein, Timo

2003-01-01

Autorid leiavad, et unistuste olemasolu ja unistamine mõjuvad motiveerivalt ning soovitavad lähtudes Dale Garnegiest "elada tänase päeva sektsioonis", mis tähendab unistamist, planeerimist ja tegutsemist ainult tänases päevas.

Ostrich: Journal of African Ornithology - Vol 89, No 1 (2018)

African Journals Online (AJOL)

Habitat variables associated with encounters of Hottentot Buttonquail Turnix hottentottus during flush surveys across the Fynbos biome · EMAIL FULL TEXT EMAIL FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Alan TK Lee, Dale R Wright, Brian Reeves, 13-18 ...

Language Testing in Japan.

Science.gov (United States)

Brown, James Dean, Ed.; Yamashita, Sayoko Okada, Ed.

Papers on second language testing in Japan include: "Differences Between Norm-Referenced and Criterion-Referenced Tests" (James Dean Brown); "Criterion-Referenced Test Construction and Evaluation" (Dale T. Griffe); "Behavioral Learning Objectives as an Evaluation Tool" (Judith A. Johnson); "Developing Norm-…

Behandeling met methadon bij de rat tijdens abruptie morfine onthouding

NARCIS (Netherlands)

Jansen van ' t Land C; van der Laan JW; de Groot G; Loeber JG

1989-01-01

De daling van de nachtelijke activiteit, het gewicht en de voedselinname zijn duidelijke onthoudingssymptomen in een rattemodel voor abrubte morfine onthouding. In dit onderzoek werd getracht deze onthoudingsverschijnselen geheel of gedeeltelijk te niet te doen door de dieren tijdens de onthouding

78 FR 22022 - Agency Information Collection Activities: Requests for Comments; Clearance of Renewed Approval of...

Science.gov (United States)

2013-04-12

... Quality Management System in relation to customer satisfaction. The Glenn Dale Distribution Center collects the customer feedback for Aviation System Standards Quality Management objectives. To accomplish... aeronautical product customer service at the point of sale. Respondents: An estimated 320 aeronautical product...

How Alzheimer's Changes the Brain

Medline Plus

Full Text Available ... YouTube. Uninterrupted. Loading... Want music and videos with zero ads? Get YouTube Red. Working... Not now Try ... Reversing Alzheimer’s Disease- Dr. Dale Bredesen, MD - Duration: 1:13:27. Silicon Valley Health Institute 102,295 ...

The Challenge of the 80's--Managing for Dual Results

Science.gov (United States)

Miller,

1978-01-01

The contributions of the school business executive to produce both economic results and people results are dependent on recognition of the importance of people consciousness. The Dale Carnegie organization is an example of the awareness of personal needs. (Author/MLF)

Download

African Journals Online (AJOL)

Administrator

O. Senbanjo, Paediatrics Gastroenterology, Hepatology and Nutrition Unit, ... However, under-nutrition remains a major nutritional problem ...... Diet culture and obesity in North. Africa. ... Mvo Z, Dick J, Steyn K. Perceptions ... J Asian Afr Stud.

O intertexto canônico em Avalovara Canonical intertext in Avalovara

Directory of Open Access Journals (Sweden)

Sandra Nitrini

2010-01-01

Full Text Available O intertexto canônico de Avalovara concretiza-se neste artigo a partir do diálogo desse romance de Osman Lins com A divina comédia, de Dante, Werther, de Goethe, Moby Dick, de Melville, e La modification, de Butor. Essas obras se unem em torno de uma experiência comum de seus protagonistas: a viagem e a busca de algo inapreensível, motivos nucleares do gênero épico.The canonical intertext Avalovara materializes in this article from the dialogue with Osman Lins's novel with The Divine Comedy, by Dante, Werther, by Goethe, Moby Dick, by Melville, and La Modification, by Butor. These works are joined around a common experience of their protagonists: the journey and the quest for something inapprehensible, nuclear reasons of epic genre.

Prion protein gene polymorphisms in Turkish native goat breeds

Indian Academy of Sciences (India)

HASAN MEYDAN

3The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of ... Eighteen single-nucleotide polymorphisms were detected in the caprine PRNP .... Sampling localities, sample size (n) and sex of Turkish native goat breeds.

Effect of dietary molybdenum and sulphur on the copper status of ...

African Journals Online (AJOL)

in all groups receiving supplementary Mo. A dietary supplement of 70 mg Mo for a restricted period is ... Keywords: Sheep nutrition, copper toxicity, molybdenum toxicity, sulphur. ..... observation supports the suggestion by Dick, et af. (1975).

OurTube / David Talbot

Index Scriptorium Estoniae

Talbot, David

2009-01-01

USA California Ülikooli töötajate Abram Stern'i ja Michael Dale'i poolt 2005. a. algatatud USA kongressis peetud kõnede videoremiksidest ja nende poolt loodud veebisaidist Metavid.org. Ka YouTube keskkonnast ja wikipedia katsetustest muuta oma keskkond multimeedialisemaks

Public Support As A Center Of Gravity For National Space Power

Science.gov (United States)

2014-04-01

Advisors: Doctor Dale Hayden Lieutenant Colonel David Hanson Major Mark Ciesel Major Carrie Chappell Maxwell Air Force Base, Alabama...2011. Wechsler , Jill. The Role of GPS in Precise Time and Frequency Dissemination. 1990. http://ilrs.gsfc.nasa.gov/docs/timing/gpsrole.pdf

Electrochemical evaluation of sweet sorghum fermentable sugar bioenergy feedstock

Science.gov (United States)

Redox active constituents of sorghum, e.g., anthocyanin, flavonoids, and aconitic acid, putatively contribute to its pest resistance. Electrochemical reactivity of sweet sorghum stem juice was evaluated using cyclic voltammetry (CV) for five male (Atlas, Chinese, Dale, Isidomba, N98) and three fema...

A Nonpharmacologic Method for Enhancing Sleep in PTSD

Science.gov (United States)

2015-10-01

Vitae Date Prepared: October 4, 2014 Name: WILLIAM DALE (SCOTT) KILLGORE Office Address: Suite 7303B Department of Psychiatry University of...Undergraduate Student, Carnegie Mellon University Served as his summer volunteer research mentor at McLean Hospital, which resulted in 2 oral research

J.G. Crowther's War: Institutional strife at the BBC and British Council.

Science.gov (United States)

Jones, Allan

2016-06-01

Science writer, historian and administrator J.G. Crowther (1899-1983) had an uneasy relationship with the BBC during the 1920s and 1930s, and was regarded with suspicion by the British security services because of his left politics. Nevertheless the Second World War saw him working for 'establishment' institutions. He was closely associated with the BBC's Overseas Service and employed by the British Council's Science Committee. Both organizations found Crowther useful because of his wide, international knowledge of science and scientists. Crowther's political views, and his international aspirations for the British Council's Science Committee, increasingly embroiled him in an institutional conflict with the Royal Society and with its president, Sir Henry Dale, who was also chairman of the British Council's Science Committee. The conflict centred on the management of international scientific relations, a matter close Crowther's heart, and to Dale's. Dale considered that the formal conduct of international scientific relations was the Royal Society's business rather than the British Council's. Crowther disagreed, and eventually resigned from the British Council Science Committee in 1946. The article expands knowledge of Crowther by drawing on archival documents to elucidate a side of his career that is only lightly touched on in his memoirs. It shows that 'Crowther's war' was also an institutional war between the Science Committee of the British Council and the Royal Society. Crowther's unhappy experience of interference by the Royal Society plausibly accounts for a retreat from his pre-war view that institutional science should plan and manage BBC science broadcasts.

Book Review: Caves and Karst of the Yorkshire Dales

Science.gov (United States)

Westaway, Rob

2015-10-01

The British Cave Research Association (BCRA) is the research division of the British Caving Association (BCA), itself the principal society in Britain for those interested in caving, with activities including provision of training and safety certification for cavers and managing access to caves. Although some UK cave-related research is carried out by academics, this tends to be restricted to archaeological investigations of caves that have served as human habitations, and to be focused more on the occupants than the caves themselves. In contrast, most cave exploration is undertaken as a leisure activity, under the auspices of clubs affiliated to the BCA/BCRA, this being indeed virtually the only field of Earth science where amateur investigators can continue to make significant discoveries. Many cave explorers are also affiliated with academic researchers, such as managers of dating laboratories; the synergy between these two groups is highly productive, having resulted for instance in the discovery and exploration in recent years of the vast Ogof Draenen cave system in South Wales, which probably dates back to the Early Pleistocene (e.g., Farrant et al., 2014).

Genetics Home Reference: alpha-methylacyl-CoA racemase deficiency

Science.gov (United States)

... racemase deficiency Sources for This Page Dick D, Horvath R, Chinnery PF. AMACR mutations cause late-onset ... Citation on PubMed Ferdinandusse S, Denis S, IJlst L, Dacremont G, Waterham HR, Wanders RJ. Subcellular localization and physiological ...

Langenud Gorilla / Kertu Ruus

Index Scriptorium Estoniae

Ruus, Kertu, 1977-

2008-01-01

Ilmunud ka: Delovõje Vedomosti 24. sept. lk. 8-9. USA investeerimispanga Lehman Brothers tegevjuhist Dick Fuldist. Vt. samas: Richard S. Fuld: CV; Ameerika unistuste täitja: vendade investeerimispank; Taust; Kommenteerivad: Madis Toomsalu ja Jonathan Well

Research perspectives overview at DBNRRC to maintain sustainable food security

Science.gov (United States)

The research issues that the Dale Bumpers National Rice Research Center (DBNRRC) is addressing for the rice industry and research community are 1) changing rice production practices, 2) diminishing irrigation resources, 3) loss of export markets due to poor quality, 4) emerging high value specialty...

Knowledge-Driven Design of Virtual Patient Simulations

Science.gov (United States)

Vergara, Victor; Caudell, Thomas; Goldsmith, Timothy; Panaiotis; Alverson, Dale

2009-01-01

Virtual worlds provide unique opportunities for instructors to promote, study, and evaluate student learning and comprehension. In this article, Victor Vergara, Thomas Caudell, Timothy Goldsmith, Panaiotis, and Dale Alverson explore the advantages of using virtual reality environments to create simulations for medical students. Virtual simulations…

Brain Damage from Soman-Induced Seizures Is Greatly Exacerbated by Dimethyl sulfoxide (DMSO): Modest Neuroprotection by 2-Aminoethyl diphenylborinate (2- APB), a Transient Receptor Potential Channel Inhibitor and Inositol 1,4,5-triphosphate Receptor Antagonist

Science.gov (United States)

2008-03-04

stereotypy, and wet-dog shakes. Overt motor convulsions were characterized by rhythmic clonic jerks of head and forepaws, rearing, salivation and Straub...Dale LB, Bhattacharya M, Anborgh PH , Murdoch B, Bhatia M, Nakanishi S, Ferguson SS. G protein-coupled receptor kinase-mediated desensitization of

Steroids and steroid analogues for Hormone Replacement Therapy; Metabolism in target tissues

NARCIS (Netherlands)

Blom, M.J.

2001-01-01

Bij vrouwen na de menopause is er een sterke daling van de oestradiol concentraties in het bloed. Hoewel oestradiol oorspronkelijk alleen beschouwd werd als een geslachtshormoon, heeft dit hormoon ook invloed op een groot aantal andere organen, waaronder het skelet, het cardiovasculaire systeem en

Input and service provision supply methods in mixed crop-livestock production systems in South-Ethiopia: Improvement options from a dairy perspective

NARCIS (Netherlands)

Terefe, T.; Lee, van der J.

2015-01-01

This study was conducted in the Dale and Shebedino districts of southern Ethiopia during the period October 2014 to January 2015. It investigates dairy-related input and service provision in mixed crop-livestock production systems. Data were collected from 120 dairy producers, six focus group

African Journal of Neurological Sciences - Vol 33, No 1 (2014)

African Journals Online (AJOL)

Mucocele fronto-ethmoïdale geante avec extension intracranienne: a propos d'un cas et revue de la litterature · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. A Kabre, DS Zabsonre, Y Haro, 50-54 ...

Indexes to Volume 55

Indian Academy of Sciences (India)

Two problems in thermal field theory. François Gelis ... Non-static local string in Brans–Dicke theory ... Sun–Earth connection: Boundary layer waves and auroras ... Dromion solutions for an electron acoustic wave and its application to space.

Design of multiple representations e-learning resources based on a contextual approach for the basic physics course

Science.gov (United States)

Bakri, F.; Muliyati, D.

2018-05-01

This research aims to design e-learning resources with multiple representations based on a contextual approach for the Basic Physics Course. The research uses the research and development methods accordance Dick & Carey strategy. The development carried out in the digital laboratory of Physics Education Department, Mathematics and Science Faculty, Universitas Negeri Jakarta. The result of the process of product development with Dick & Carey strategy, have produced e-learning design of the Basic Physics Course is presented in multiple representations in contextual learning syntax. The appropriate of representation used in the design of learning basic physics include: concept map, video, figures, data tables of experiment results, charts of data tables, the verbal explanations, mathematical equations, problem and solutions example, and exercise. Multiple representations are presented in the form of contextual learning by stages: relating, experiencing, applying, transferring, and cooperating.

Phase transitions and Heisenberg limited metrology in an Ising chain interacting with a single-mode cavity field

DEFF Research Database (Denmark)

Gammelmark, Søren; Mølmer, Klaus

2011-01-01

We investigate the thermodynamics of a combined Dicke and Ising model that exhibits a rich phenomenology arising from the second-order and quantum phase transitions from the respective models. The partition function is calculated using mean-field theory, and the free energy is analyzed in detail...... to determine the complete phase diagram of the system. The analysis reveals both first- and second-order Dicke phase transitions into a super-radiant state, and the cavity mean field in this regime acts as an effective magnetic field, which restricts the Ising chain dynamics to parameter ranges away from...... the Ising phase transition. Physical systems with first-order phase transitions are natural candidates for metrology and calibration purposes, and we apply filter theory to show that the sensitivity of the physical system to temperature and external fields reaches the 1/N Heisenberg limit....

Dynamics of a trapped two-level and three-level atom interacting with classical electromagnetic field

International Nuclear Information System (INIS)

Ray, Aditi

2004-01-01

The dynamics of a two-level atom driven by a single laser beam and three-level atom (Lambda configuration) irradiated by two laser beams are studied taking into account of the quantized center-of-mass motion of the atom. It is shown that the trapped atom system under appropriate resonance condition exhibits the large time-scale revivals when the index of the vibrational sideband responsible for the atomic electronic transition is greater than unity. The revival times are shown to be dependent on the initial number of vibrational excitations and the magnitude of the Lamb-Dicke parameter. The sub-Poissonian statistics in vibrational quantum number is observed at certain time intervals. The minimum time of interaction for which the squeezed states of motional quadrature are generated is found to be decreasing with the increase in the Lamb-Dicke parameter

The maximum sizes of large scale structures in alternative theories of gravity

Energy Technology Data Exchange (ETDEWEB)

Bhattacharya, Sourav [IUCAA, Pune University Campus, Post Bag 4, Ganeshkhind, Pune, 411 007 India (India); Dialektopoulos, Konstantinos F. [Dipartimento di Fisica, Università di Napoli ' Federico II' , Complesso Universitario di Monte S. Angelo, Edificio G, Via Cinthia, Napoli, I-80126 Italy (Italy); Romano, Antonio Enea [Instituto de Física, Universidad de Antioquia, Calle 70 No. 52–21, Medellín (Colombia); Skordis, Constantinos [Department of Physics, University of Cyprus, 1 Panepistimiou Street, Nicosia, 2109 Cyprus (Cyprus); Tomaras, Theodore N., E-mail: sbhatta@iitrpr.ac.in, E-mail: kdialekt@gmail.com, E-mail: aer@phys.ntu.edu.tw, E-mail: skordis@ucy.ac.cy, E-mail: tomaras@physics.uoc.gr [Institute of Theoretical and Computational Physics and Department of Physics, University of Crete, 70013 Heraklion (Greece)

2017-07-01

The maximum size of a cosmic structure is given by the maximum turnaround radius—the scale where the attraction due to its mass is balanced by the repulsion due to dark energy. We derive generic formulae for the estimation of the maximum turnaround radius in any theory of gravity obeying the Einstein equivalence principle, in two situations: on a spherically symmetric spacetime and on a perturbed Friedman-Robertson-Walker spacetime. We show that the two formulae agree. As an application of our formula, we calculate the maximum turnaround radius in the case of the Brans-Dicke theory of gravity. We find that for this theory, such maximum sizes always lie above the ΛCDM value, by a factor 1 + 1/3ω, where ω>> 1 is the Brans-Dicke parameter, implying consistency of the theory with current data.

Non-minimal quintessence: Dynamics and coincidence problem

Indian Academy of Sciences (India)

Brans–Dicke scalar–tensor theory provides a conformal coupling of the scalar field with gravity in Einstein's frame. ... explain the present ratio of energy densities in the Universe, i.e. the ... and it's differences from general relativity is presented.

The Practical Astronomer

Science.gov (United States)

Koester, Jack

"The Practical Astronomer" by Thomas Dick, LLD, E.C. & J. Biddle, Philadelphia, 1849, is reviewed. Information on telescope makers and astronomers can be found. Mentioned are: Fraunhofer; John Herschel; Lawson; Dollond; Tulley; W. & S. Jones; and S.W. Burnham.

Myrtle Beach Air Force Base Community Redevelopment Plan

Science.gov (United States)

1993-01-01

Chairperson Economic Development: Harold Tadlock Bill Benson Don Leonard Craig Wall Education & Training: Kent Sharples , Chairperson Dick Rosen Doug...Airport: Ralph Panzrino. Chairperson Mike Leahy Betty Martin Eugene Dorman, Chairperson Jessie Ward Donald Hardee Gene Stroman Bill Brown David

A Comparative Study between U.S. and Brazilian Acquisition Regulations and Practices

Science.gov (United States)

2011-03-01

to describe continuous improvements efforts ( Render and Heizer , 2008). Caddick and Dale (1998) on their paper ‘The impact of quality management on...2002). Outsourcing in Edinburgh and the Lothians. European Journal of Purchasing and Supply Chain Management 8 (2) 83-95. Render , Barry; Heizer , Jay

Mõõdulindiga õnne ja edu kallal / Anneli Aasmäe

Index Scriptorium Estoniae

Aasmäe, Anneli, 1973-

2000-01-01

Juhtimiskonsultant Mait Raava kinnitusel on edukus 70 protsenti kaasasündinud omadus, Eesti edukatel on tegutsemisvajadus veres, nad võivad toetuda Iisraeli päritolu juhtimisteoreetiku Eliyahu M. Goldratti õpetusele, mitte eduretsepte ja õnnevalemeid pakkuvaile autorite rivile Dale Carnegie'st Ben Furmanini. Kommentaarid: Aune Past, Mait Raava

A simple graphical method for deriving kinetics of repair from fractionated and protracted irradiations

International Nuclear Information System (INIS)

Scalliet, P.; Schueren, E. van der; Erfmann, R.K.L.; Landuyt, W.

1988-01-01

The authors present a method for the derivation of the time constant of repair from fractionated and protracted irradiations, using formulae based on those derived by Dale (1985) and Liversage (1969) establishing the correlation between the biological effects of low dose rate and acute fractionated irradiation. (UK)

Application of refractive index mixing rules in binary systems of ...

Indian Academy of Sciences (India)

... entire mole fraction range of hexadecane and heptadecane at the three temperatures. Comparison of various mixing rules has been expressed in terms of average percentage deviation. The performance of the Lorentz- Lorenz and Heller relations is relatively better than that of the Weiner and Gladstone-Dale relations.

On JALT 95: Curriculum and Evaluation. Proceedings of the JALT International Conference on Language Teaching/Learning (22nd, Nagoya, Japan, November 1995). Section Seven: Testing and Evaluation.

Science.gov (United States)

Brown, James Dean; And Others

This section contains conference papers on testing and evaluation in second language teaching. They include: "English Language Entrance Examinations in Japan: Problems and Solutions" (James Dean Brown); "Reliability and a Learner Style Questionnaire" (Dale T. Griffee); "Does It Work?" Evaluating Language Learning Tasks" (Rod Ellis); "Communicative…

Rice diversity panels available through the genetic stocks oryza collection

Science.gov (United States)

The Genetic Stocks Oryza (GSOR) Collection was established in 2004 at the USDA-ARS, Dale Bumpers National Rice Research Center (DBNRRC) located in Stuttgart, AR. The mission of GSOR is to provide unique genetic resources to the rice research community for genetic and genomics related research. GSOR ...

Aquatic Plant Control Research Program. Biological Control of Pistia stratiotes L. (Waterlettuce) Using Neohydronomus affinis Hustache (Coleoptera: Curculionidae).

Science.gov (United States)

1992-07-01

plant must also be examined for herbivores attacking the weed. This ensures that time and money are not wasted by importing insects already present in...Agricultural Research Service Aquatic Weed Research Laboratory in Fort Lauder - dale, FL, from quarantine tacilities in Gainesville, FL, on 11 February

Lugu, mis lendab üle kolme zhanri / Olev Remsu

Index Scriptorium Estoniae

Remsu, Olev, 1947-

2006-01-01

Üks süžee üliedukas kolmes žanris : romaan, näidend, film. Ken Kesey romaan "Lendas üle käopesa", mille alusel Dale Wasserman kirjutas samanimelise näidendi ja režissöör Milos Forman tegi 1975.a. filmi.

Beyond borders : broadening the artistic palette of (composing) improvisers in jazz

NARCIS (Netherlands)

Graaf, de D.P.

2017-01-01

In this on-line dissertation, jazz saxophonist Dick de Graaf investigates a variety of compositional and improvisational models and techniques in contemporary jazz and Western art music, and discusses possible applications of these materials in current jazz practices. The study includes

Valge Maja endine kõnemees tunnistab raamatus vassimist / Hendrik Vosman

Index Scriptorium Estoniae

Vosman, Hendrik

2007-01-01

USA Valge Maja endine pressiesindaja Scott McClellan süüdistab oma ilmuvas raamatus nii USA presidenti George W. Bushi kui asepresident Dick Cheneyt selles, et avalikkusele on antud valeinfot CIA salaagendi Valerie Plame Wilsoni identiteedi lekitamise kohta. Lisa: "Plamegate"

Kies voor eenvoud! ; PSO Matrix is hulpmiddel bij keuzes in veranderingsprojecten

NARCIS (Netherlands)

Dick Markvoort

2009-01-01

In elke organisatie zijn er krachten en invloeden werkzaam, waardoor de organisatie neigt naar aannemen van grote en complexe projecten. Door bewust te kiezen voor eenvoud is veel geld te besparen. Do as much nothing as possible, stelt Dick Markvoort.

75 FR 55515 - Proposed Flood Elevation Determinations

Science.gov (United States)

2010-09-13

... Road. Township of Hollenback, Township of Rice, Township of Wright. Approximately 535 feet None +1526 upstream of Dale Drive. Black Creek Approximately 910 feet None +1461 Borough of West upstream of Hazleton.... Township of Rice Maps are available for inspection at the Rice Township Building, 3000 Church Road...

Effect 5e Nitraat Actie Programma op de bodembelasting. Berekening bodembelasting voor berekening van de waterkwaliteit

NARCIS (Netherlands)

Koeijer, de T.J.; Luesink, H.H.

2015-01-01

Uit de MAMBO-berekeningen blijkt dat door invoering van het 5e NAP het gebruik van dierlijke mest op zandgrond daalt. De grootste daling treedt in het zuidelijk zandgebied op. Daarnaast treedt er een verschuiving op van de aanwending van varkensmest naar graasdiermest. Dit komt door de aanscherping

Journal of Endocrinology, Metabolism and Diabetes of South Africa ...

African Journals Online (AJOL)

Sleep: a serious contender for the prevention of obesity and non-communicable diseases · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Dale E. Rae, Irshaad Ebrahim, Laura C. Roden, 48-49. http://dx.doi.org/10.1080/16089677.2016.1150574 ...

Oversight Hearing on Drug Abuse Education Programs. Hearing before the Subcommittee on Elementary, Secondary, and Vocational Education of the Committee on Education and Labor. House of Representatives, 101st Congress, 2nd Session (Vancouver, Washington, September 6, 1990).

Science.gov (United States)

Congress of the U.S., Washington, DC. House Committee on Education and Labor.

The text of an oversight hearing on Drug Abuse Resistance Education (DARE) programs is presented in this document. Introductory statements by Representatives Jolene Unsoeld and Dale E. Kildee are presented. Testimony by these witnesses is included: (1) Roy Bondurant, student, and Roy "Skip" Bondurant, parent, Tenino, Washington; (2) Paul…

A Proposed Multimedia Cone of Abstraction: Updating a Classic Instructional Design Theory

Science.gov (United States)

Baukal, Charles E.; Ausburn, Floyd B.; Ausburn, Lynna J.

2013-01-01

Advanced multimedia techniques offer significant learning potential for students. Dale (1946, 1954, 1969) developed a Cone of Experience (CoE) which is a hierarchy of learning experiences ranging from direct participation to abstract symbolic expression. This paper updates the CoE for today's technology and learning context, specifically focused…

77 FR 61751 - Farm Credit Administration Board; Sunshine Act; Regular Meeting

Science.gov (United States)

2012-10-11

... meeting is: Open Session A. Approval of Minutes September 13, 2012 B. New Business Final Rule--Investment... its business. FOR FURTHER INFORMATION CONTACT: Dale L. Aultman, Secretary to the Farm Credit... Drive, McLean, Virginia 22102-5090. SUPPLEMENTARY INFORMATION: This meeting of the Board will be open to...

Individual Differences and Short-Term Military Factors Associated With Unhealthy Weight Control Behaviors Among Active Duty and Reserve Army Soldiers

Science.gov (United States)

2009-03-01

sports associated with leanness such as gymnastics or wrestling are more likely to engage in unhealthy weight loss behaviors than athletes involved...unhealthy weight loss behaviors in the months prior to the APFT and weigh-in (Dale & Landers, 1999). Performing artists such as dancers also may be more

Final Assembly, Testing and Processing of the Rigidizable Inflatable Get-Away-Special Experiment (RIGEX) for Spaceflight Qualification

Science.gov (United States)

2007-09-01

Determined heating profile of tubes, Verified Piezo patch funtionability after heating, Full Scale Deployment Test, Pressure System Test, SERB - Moody...Ohm Resistor (Vishay Dale) 1 704.910.3 EAO Impulse Switch 1 H335111200 Current Display (Simpson) 1 MB 2061SS1W01- CA Bushing Mount Miniature

Toward a Hermeneutical Theory of International Human Rights Education

Science.gov (United States)

Al-Daraweesh, Fuad; Snauwaert, Dale T.

2013-01-01

The purpose of this essay is to articulate and defend the epistemological foundations of international human rights education from the perspective of a hermeneutical interpretive methodology. Fuad Al-Daraweesh and Dale Snauwaert argue here that this methodology potentially alleviates the challenges that face the cross-cultural implementation of…

Illegal deforestation in Zambia

OpenAIRE

Travis, A.J.

2005-01-01

Dr. Dale Lewis, a co-PI on the grant and the originator of the COMACO model, points out recent illegal deforestation in one of Zambia's National Forests to Dr. Alfonso Torres, another co-PI on the grant (from Cornell). LTRA-2 (An Agricultural Markets Model for Biodiversity Conservation)

Superresolution improves MRI cortical segmentation with FACE

DEFF Research Database (Denmark)

Eskildsen, Simon Fristed; Manjón, José V.; Coupé, Pierrick

the cerebral cortex have been developed during the last decade (Dale 1999, Kim 2005, Eskildsen 2006). In many studies, the resolution of the morphological image acquisition sequence is chosen to be relatively low (~1mm3) due to time and equipment constraints. To improve segmentation accuracy, such low...

Life cycle behavior under uncertainty : Essays on savings, mortgages and health

NARCIS (Netherlands)

van Ooijen, Raun

2016-01-01

De financiële crisis van 2007-2008 maakt duidelijk dat onzekerheid er toe doet. De sterke daling in aandelen- en huizenprijzen, in combinatie met riskante hypotheekleningen, heeft een grote invloed op de financiële positie van huishoudens. Het doel van dit proefschrift is te achterhalen in welke

A Comment on the geometry of some scalar-tensor theories

Energy Technology Data Exchange (ETDEWEB)

Lindstrom, U

1986-08-01

We show that the scalar field in scalar-tensor theories such as the Jordan-Brans-Dicke theory has an interpretation as a potential for the torsion in a Riemannian manifold. The relation is similar to that of the metric to the connection.

STS 51-L crewmembers during training session in flight deck simulation

Science.gov (United States)

1985-01-01

S85-46207 (December 1985) --- Shuttle Mission Simulator (SMS) scene of astronauts Michael J. Smith, Ellison S. Onizuka, Judith A. Resnik, and Francis R. (Dick) Scobee in their launch and entry positions on the flight deck. The photo was taken by Bill Bowers.

Hongos tremeloides (Heterobasidiomycetes de la Reserva de la Biosfera de Calakmul, Campeche, México Tremelloid fungi (Heterobasidiomycetes from Calakmul Biosphere Reserve, Campeche, Mexico

Directory of Open Access Journals (Sweden)

Sigfrido Sierra

2012-03-01

Full Text Available Se registran 7 especies de hongos tremeloides de la Reserva de la Biosfera de Calakmul: Auricularia cornea Ehrenb., A. delicata (Fr. Henn., A. mesenterica (Dicks. Pers., Dacryopinax elegans (Berk. et M.A. Curtis G.W. Martin, D. spathularia (Schwein. G.W. Martin, Tremella wrightii Berk. et M.A. Curtis y Tremelloscypha gelatinosa (Murrill Oberw. et K. Wells. Todas son registros nuevos para la reserva. Auricularia cornea y T. gelatinosa son nuevos registros para el estado de Campeche.Seven species of tremelloid fungi are recorded from Calakmul Biosphere Reserve: Auricularia cornea Ehrenb., A. delicata (Fr. Henn., A. mesenterica (Dicks. Pers., Dacryopinax elegans (Berk. et M.A. Curtis G.W. Martin, D. spathularia (Schwein. G.W. Martin, Tremella wrightii Berk. et M.A. Curtis and Tremelloscypha gelatinosa (Murrill Oberw. et K. Wells. All are new records for the reserve. Auricularia cornea and T. gelatinosa are new records for Campeche state.

Linguistically Motivated Features for CCG Realization Ranking

Science.gov (United States)

Rajkumar, Rajakrishnan

2012-01-01

Natural Language Generation (NLG) is the process of generating natural language text from an input, which is a communicative goal and a database or knowledge base. Informally, the architecture of a standard NLG system consists of the following modules (Reiter and Dale, 2000): content determination, sentence planning (or microplanning) and surface…

Community College Leadership for the '80s. AACJC Leadership Bookshelf Series, Number 1.

Science.gov (United States)

Roueche, John E., Ed.; Baker, George A., III, Ed.

These essays were prepared by leaders with recognized success in community college and university management, who were asked to share their experiences, the techniques they have found useful, and their personal views about community college leadership. After an introduction by Dale Parnell to the importance of leadership in institutional success,…

Sleep: a serious contender for the prevention of obesity and non ...

African Journals Online (AJOL)

Sleep: a serious contender for the prevention of obesity and non-communicable diseases. Dale E. Rae, Irshaad Ebrahim, Laura C. Roden. Abstract. No Abstract. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.1080/16089677.2016.

75 FR 22175 - Qualification of Drivers; Exemption Applications; Vision

Science.gov (United States)

2010-04-27

.... Phillips, Joseph A. Ragan, Mark C. Reineke, David J. Schie, David M. Sims, Roland D. Spaniol, Kevin Stein... conditions: James H. Bailey, Johnny J. Campbell, Malcolm J. Celestine, Dale G. Darling, Keith E. Fimon.... Georgeff, Joseph Revis, Jr., Lawrence C. Smoak, III, David C. Watson, Paula L. Wharton. One applicant...

More than Words: Comics as a Means of Teaching Multiple Literacies

Science.gov (United States)

Jacobs, Dale

2007-01-01

Historically, comics have been viewed as a "debased or simplified word-based literacy," explains Dale Jacobs, who considers comics to be complex, multimodal texts. Examining Ted Naifeh's "Polly and the Pirates," Jacobs shows how comics can engage students in multiple literacies, furthering meaning-making practices in the classroom and beyond.

Journal of Biosciences | Indian Academy of Sciences

Indian Academy of Sciences (India)

Home; Journals; Journal of Biosciences. Gavan Holloway. Articles written in Journal of Biosciences. Volume 28 Issue 3 April 2003 pp 323-335 Articles. HIV-1 Nef control of cell signalling molecules: multiple strategies to promote virus replication · Alison L Greenway Gavan Holloway Dale A McPhee Phoebe Ellis Alyssa ...

Bakry–Émery black holes

International Nuclear Information System (INIS)

Rupert, M; Woolgar, E

2014-01-01

Scalar–tensor gravitation theories, such as the Brans–Dicke family of theories, are commonly partly described by a modified Einstein equation in which the Ricci tensor is replaced by the Bakry–Émery–Ricci tensor of a Lorentzian metric and scalar field. In physics this formulation is sometimes referred to as the ‘Jordan frame’. Just as, in General Relativity, natural energy conditions on the stress–energy tensor become conditions on the Ricci tensor, in scalar–tensor theories expressed in the Jordan frame natural energy conditions become conditions on the Bakry–Émery–Ricci tensor. We show that, if the Bakry–Émery tensor obeys the null energy condition with an upper bound on the Bakry–Émery scalar function, there is a modified notion of apparent horizon which obeys analogues of familiar theorems from General Relativity. The Bakry–Émery modified apparent horizon always lies behind an event horizon and the event horizon obeys a modified area theorem. Under more restrictive conditions, the modified apparent horizon obeys an analogue of the Hawking topology theorem in four spacetime dimensions. Since topological censorship is known to yield a horizon topology theorem independent of the Hawking theorem, in an appendix we obtain a Bakry–Émery version of the topological censorship theorem. We apply our results to the Brans–Dicke theory, and obtain an area theorem for horizons in that theory. Our theorems can be used to understand behaviour observed in numerical simulations by Scheel et al (1995 Phys. Rev. D 51 4236–49) of dust collapse in Brans–Dicke theory. (paper)

Language for Profit: Spanish-English Bilingualism in Lowe's Home Improvement

Science.gov (United States)

Hepford, Elizabeth A.

2017-01-01

The USA is commonly portrayed as a country dominated by the ideology of monolingualism [Dick, Hilary Parsons. 2011. "Language and Migration to the United States." "Annual Review of Anthropology" 40: 227-240; Silverstein, Michael. 1996. "Monoglot 'Standard' in America: Standardization and Metaphors of Linguistic…

A Question of Ethics: Themes in the Science Fiction Genre.

Science.gov (United States)

McNurlin, Kathleen Woitel

1995-01-01

Continues an article that began in the summer 1995 "Interdisciplinary Humanities." Examines ethical concerns about nuclear power, societal control, and prejudice articulated in science fiction literature. Authors studied include Ray Bradbury, Philip K. Dick, and Damon Knight. The earlier article covered literature concerned with ecology…

Kas Euroopas olid CIA salavanglad? / Andres Herkel

Index Scriptorium Estoniae

Herkel, Andres, 1962-

2006-01-01

Dick Marty raportist USA Luure Keskagentuuri (CIA) oletatavatest salavanglatest Euroopas. Autor on seisukohal, et Euroopal tuleb igal juhul välja selgitada tõde CIA salavanglate olemasolu kohta, sest vastasel korral saab Venemaa argumendi inimõigustevastase tegevuse kaitseks. Vt. samas: CIA salavanglad ja -lennud Euroopas

Multiparticle entanglement under the influence of decoherence

NARCIS (Netherlands)

Gühne, O.; Bodoky, F.; Blaauboer, M.

2008-01-01

We present a method to determine the decay of multiparticle quantum correlations as quantified by the geometric measure of entanglement under the influence of decoherence. With this, we compare the robustness of entanglement in Greenberger-Horne-Zeilinger (GHZ), cluster, W, and Dicke states of four

United States Air Force F-35A Operational Basing Environmental Impact Statement. Appendix E: Final EIS Public Comments and Responses

Science.gov (United States)

2013-09-01

Virginia Cryan Essex Junction VT R-PCS-8187 David and Dale Piper Middlebury VT R-PCS-2224 Manuel Cueto Colchester VT R-PCS-5615 Dan Pipes Fairfield... Cruz South Burlington VT R-PCOY-0218 Mohet Cruz South Burlington VT R-PCOY-0180 Don Cummings South Burlington VT R-PCOY-0113 Rene Cusson South

78 FR 52602 - Qualification of Drivers; Exemption Applications; Vision

Science.gov (United States)

2013-08-23

... showing requirement red, green, and amber (49 CFR 391.41(b)(10)). FMCSA recognizes that some drivers do.... Thane (OH), Larry A. Tidwell (MO), Dale Torkelson (WI), Norman Vanderzyl (IA), John Vanek (MO), James D. Vorderbruggen (MN), Desmond Waldor (PA), Alicia Waters (IL), Norman R. Wilson (WA), James G. Witt (AZ), James L...

Host Cell Virus Entry Mediated by Australian Bat Lyssavirus Envelope G glycoprotein

Science.gov (United States)

2013-10-24

Richard M. (US), Dzimian, Joyce L. (US), Godwin, Glenn P. (US), Price, Paul J. (US), Epstein, David A. (US), Gruber, Dale (US), Mcclure, Don (US). 2004...of the shedding. Microbiol Immunol 49:733-43 258. Thoulouze MI, Lafage M, Schachner M, Hartmann U, Cremer H, Lafon M. 1998. The neural cell adhesion

The benefits of a product-independent lexical database with formal word features

NARCIS (Netherlands)

Froon, Johanna; Froon, Janneke; de Jong, Franciska M.G.

Dictionaries can be used as a basis for lexicon development for NLP applications. However, it often takes a lot of pre-processing before they are usable. In the last 5 years a product-independent database of formal word features has been developed on the basis of the Van Dale dictionaries for Dutch.

Assessment of Physicochemical and Major Chemical Parameters of ...

African Journals Online (AJOL)

The study was undertaken to assess the physicochemical and major chemical parameters of water springs in Iddo Wara Wale area of Dale Sadi district of Kellem Wollega, Oromia, Ethiopia. A total of 20 L samples were collected from five densely populated springs, namely: Ittisa, Abba Moga, Kersa, Ele Gonda and Merfata ...

Drought occurence

Science.gov (United States)

John W. Coulston

2007-01-01

Why Is Drought Important? Drought is an important forest disturbance that occurs regularly in the Western United States and irregularly in the Eastern United States (Dale and others 2001). Moderate drought stress tends to slow plant growth while severedrought stress can also reduce photosynthesis (Kareiva and others 1993). Drought can also interact with...

Evaluation of quality parameters of strawberry fruits in modified ...

African Journals Online (AJOL)

STORAGESEVER

2009-03-06

Mar 6, 2009 ... postharvest physiology of strawberry. In: Luby JJ, Dale A (Eds.), The. Strawberry into the 21th Century. Timber Press, Portland, OR, pp. 145-152. Kovach J, Petzoldt R, Harman GE (2000). Use honey bees and bumble bees to disseminate Trichoderma harzianum 1295-22 to straw- berries for botrytis control.

America's Teacher Colleges: Are They Making the Grade? Hearing before the Subcommittee on 21st Century Competitiveness of the Committee on Education and the Workforce. House of Representatives, One Hundred Eighth Congress, First Session (May 20, 2003).

Science.gov (United States)

Congress of the U.S., Washington, DC. House Committee on Education and the Workforce.

A hearing was held to explore whether U. S. teachers' colleges are doing an adequate job. Opening statements by Representative Howard P. McKeon and Representative Dale Kildee set the stage for the testimony of these witnesses: (1) Lisa Graham Keegan, Chief Executive Officer, Education Leaders Council; (2) Kati Haycock, Director, The Education…

Renewing the American Community College. The Jossey-Bass Higher Education Series.

Science.gov (United States)

Deegan, William L.; And Others

A framework for examining the future development of the community college and specific policy and program proposals is provided by the 13 essays in this collection. Part one, "The Community College in Perspective," includes "The Evolution of Two-Year Colleges Through Four Generations," by Dale Tillery and William L. Deegan; and "Determining…

Distinction of genotypes of viral haemorrhagic septicaemia virus (VHSV) by monoclonal antibodies

DEFF Research Database (Denmark)

Ito, Takafumi; Kurita, J.; Sano, M.

III isolates except the rainbow trout pathogenic isolate from Norway (NO-2007-50-385) (Dale et al. in press), but did react with the New Brunswick VHSV IVb isolate (Oliver 2002, Gagné et al. 2007). Another MAb (VHS-1.88) reacted with genotype IVb only, except with the New Brunswick isolate...

The effects of crude protein percentage and urea in different stages ...

African Journals Online (AJOL)

Laasgenoemde koeie het betekenisvol (P < 0,01) beter geproduseer as koeie op Behandeling 4. Melkproduksie het in die geval van die hoe produseerders op Behandelings 1, 2 en 3 teen 'n tempo van 1,8% per week gedaal, na bereiking van piekproduksie, teenoor die 1,4% produksie-daling vir koeie op Behandeling 4.

Navy and Marine Corps Medical News. Issue 24

Science.gov (United States)

2008-12-19

for shipboard surgeries, including hernia repair and eye sur- gery. One of the mission’s most memorable surgeries involved two eight-year...the command in all BU- MED required and tracked popula- tion health metrics, except for one ( cervical cancer screening). Dick concluded, “My

assessment of the toxicity of radiographic developer effluent

African Journals Online (AJOL)

Stephen

ASSESSMENT OF THE TOXICITY OF RADIOGRAPHIC DEVELOPER ... as a source of food (protein), sporting tools for anglers; and a vital part of the ecosystem (tertiary ... in estuaries and coastal waters which because of the ... particularly vulnerable (Dicks, 1983; Health 1987). .... discharges into the marine and coastal.

Survey of electronic payment methods and systems

NARCIS (Netherlands)

Havinga, Paul J.M.; Smit, Gerardus Johannes Maria; Helme, A.; Verbraeck, A.

1996-01-01

In this paper an overview of electronic payment methods and systems is given. This survey is done as part of the Moby Dick project. Electronic payment systems can be grouped into three broad classes: traditional money transactions, digital currency and creditdebit payments. Such payment systems have

77 FR 39717 - Changes in Flood Hazard Determinations

Science.gov (United States)

2012-07-05

...- Chairman, Larimer Collins, CO 80521. index.php/colorado/ 1110P). County Board of larimer/. Commissioners, P.O. Box 1190, Fort Collins, CO 80522. Park Unincorporated The Honorable Dick 501 Main Street, http..., FL 33040. Marathon, FL 33050. Santa Rosa Unincorporated The Honorable Jim Building http:// June 28...

Octopus: embracing the energy efficiency of handheld multimedia computers

NARCIS (Netherlands)

Havinga, Paul J.M.; Smit, Gerardus Johannes Maria

1999-01-01

In the MOBY DICK project we develop and define the architecture of a new generation of mobile hand-held computers called Mobile Digital Companions. The Companions must meet several major requirements: high performance, energy efficient, a notion of Quality of Service (QoS), small size, and low

Dynamic Stark broadening as the Dicke narrowing effect

International Nuclear Information System (INIS)

Calisti, A.; Mosse, C.; Ferri, S.; Talin, B.; Rosmej, F.; Bureyeva, L. A.; Lisitsa, V. S.

2010-01-01

A very fast method to account for charged particle dynamics effects in calculations of spectral line shape emitted by plasmas is presented. This method is based on a formulation of the frequency fluctuation model (FFM), which provides an expression of the dynamic line shape as a functional of the static distribution of frequencies. Thus, the main numerical work rests on the calculation of the quasistatic Stark profile. This method for taking into account ion dynamics allows a very fast and accurate calculation of Stark broadening of atomic hydrogen high-n series emission lines. It is not limited to hydrogen spectra. Results on helium-β and Lyman-α lines emitted by argon in microballoon implosion experiment conditions compared with experimental data and simulation results are also presented. The present approach reduces the computer time by more than 2 orders of magnitude as compared with the original FFM with an improvement of the calculation precision, and it opens broad possibilities for its application in spectral line-shape codes.

Dynamics of the Dicke model and superradiant state

International Nuclear Information System (INIS)

Bogolubov, N.N. Jr.; Kurbatov, A.M.; Kazaryan, A.R.; Neskoromnyi, V.N.

1983-12-01

A system of two-level atoms interacting with a photon field in the ''rotating wave'' approximation is investigated. For the Green's function of such a system an exact equation in which the variables of the photon field are eliminated is obtained. The self-consistent field approximation and the small value of the coupling constant are used to obtain a closed system of equations. The non-equilibrium superradiant conditions are derived. The influence of the initial conditions on the system's dynamics is studied. It is shown that if the temperature of photon heat bath is not equal to zero, the only way to superradiance is spatially inhomogeneous initial conditions. (author)

Extension of Loop Quantum Gravity to Metric Theories beyond General Relativity

International Nuclear Information System (INIS)

Ma Yongge

2012-01-01

The successful background-independent quantization of Loop Quantum Gravity relies on the key observation that classical General Relativity can be cast into the connection-dynamical formalism with the structure group of SU(2). Due to this particular formalism, Loop Quantum Gravity was generally considered as a quantization scheme that applies only to General Relativity. However, we will show that the nonperturbative quantization procedure of Loop Quantum Gravity can be extended to a rather general class of metric theories of gravity, which have received increased attention recently due to motivations coming form cosmology and astrophysics. In particular, we will first introduce how to reformulate the 4-dimensional metric f(R) theories of gravity, as well as Brans-Dicke theory, into connection-dynamical formalism with real SU(2) connections as configuration variables. Through these formalisms, we then outline the nonpertubative canonical quantization of the f(R) theories and Brans-Dicke theory by extending the loop quantization scheme of General Relativity.

The Aquarius Ocean Salinity Mission High Stability L-band Radiometer

Science.gov (United States)

Pellerano, Fernando A.; Piepmeier, Jeffrey; Triesky, Michael; Horgan, Kevin; Forgione, Joshua; Caldwell, James; Wilson, William J.; Yueh, Simon; Spencer, Michael; McWatters, Dalia;

Obtaining a W state from a Greenberger-Horne-Zeilinger state via stochastic local operations and classical communication with a rate approaching unity.

Science.gov (United States)

Yu, Nengkun; Guo, Cheng; Duan, Runyao

2014-04-25

We introduce a notion of the entanglement transformation rate to characterize the asymptotic comparability of two multipartite pure entangled states under stochastic local operations and classical communication (SLOCC). For two well known SLOCC inequivalent three-qubit states |GHZ⟩=(1/2)(|000⟩+|111⟩) and |W⟩=(1/3)(|100⟩+|010⟩+|001⟩), we show that the entanglement transformation rate from |GHZ⟩ to |W⟩ is exactly 1. That means that we can obtain one copy of the W state from one copy of the Greenberg-Horne-Zeilinger (GHZ) state by SLOCC, asymptotically. We then apply similar techniques to obtain a lower bound on the entanglement transformation rates from an N-partite GHZ state to a class of Dicke states, and prove the tightness of this bound for some special cases which naturally generalize the |W⟩ state. A new lower bound on the tensor rank of the matrix permanent is also obtained by evaluating the tensor rank of Dicke states.

Highly noise resistant multiqubit quantum correlations

Science.gov (United States)

Laskowski, Wiesław; Vértesi, Tamás; Wieśniak, Marcin

2015-11-01

We analyze robustness of correlations of the N-qubit GHZ and Dicke states against white noise admixture. For sufficiently large N, the Dicke states (for any number of excitations) lead to more robust violation of local realism than the GHZ states (e.g. for N > 8 for the W state). We also identify states that are the most resistant to white noise. Surprisingly, it turns out that these states are the GHZ states augmented with fully product states. Based on our numerical analysis conducted up to N = 8, and an analytical formula derived for any N parties, we conjecture that the three-qubit GHZ state augmented with a product of (N - 3) pure qubits is the most robust against white noise admixture among any N-qubit state. As a by-product, we derive a single Bell inequality and show that it is violated by all pure entangled states of a given number of parties. This gives an alternative proof of Gisin’s theorem.

Highly noise resistant multiqubit quantum correlations

International Nuclear Information System (INIS)

Laskowski, Wiesław; Wieśniak, Marcin; Vértesi, Tamás

2015-01-01

We analyze robustness of correlations of the N-qubit GHZ and Dicke states against white noise admixture. For sufficiently large N, the Dicke states (for any number of excitations) lead to more robust violation of local realism than the GHZ states (e.g. for N > 8 for the W state). We also identify states that are the most resistant to white noise. Surprisingly, it turns out that these states are the GHZ states augmented with fully product states. Based on our numerical analysis conducted up to N = 8, and an analytical formula derived for any N parties, we conjecture that the three-qubit GHZ state augmented with a product of (N − 3) pure qubits is the most robust against white noise admixture among any N-qubit state. As a by-product, we derive a single Bell inequality and show that it is violated by all pure entangled states of a given number of parties. This gives an alternative proof of Gisin’s theorem. (paper)

De daling van het aantal verkeersdoden in 2004 nader geanalyseerd.

NARCIS (Netherlands)

Weijermars, W.A.M. Bijleveld, F.D. & Stipdonk, H.L.

2011-01-01

Further analysis of the decrease in the number of road fatalities in 2004. The numbers of road fatalities as well as the risk of dying in a road crash have been showing a downward trend. In 2004, the number of fatalities and the crash rate showed a relatively strong decline. In the present report

Easy prediction of the refractive index for binary mixtures of ionic liquids with water or ethanol

International Nuclear Information System (INIS)

Rilo, E.; Domínguez-Pérez, M.; Vila, J.; Segade, L.; García, M.; Varela, L.M.; Cabeza, O.

2012-01-01

Highlights: ► We measure refractive index, n, in seven systems formed by IL + water or ethanol. ► Independently, theoretical estimations of the refractive index values were performed. ► To do that we use Gladstone–Dale and Newton models, relating n and density. ► We calculate density of each system from the value of the pure components. ► The agreement between experimental and calculated n values is about 99.8%. - Abstract: In this paper, we demonstrate that it is possible to know the refractive index, n D , of every given mixture of 1-alkyl-3methyl imidazolium tetrafluoroborate with water and ethanol just from the knowledge of the refractive index and density of pure components. To do that, we measured n D for seven different mixtures in all range of existing concentrations and, independently, we deduce n D theoretically. Both sets of values differ less than a 0.2% on average. The theoretical deduction takes into account that these mixtures are quasi-ideal from the molar volume point of view, as recently published, and so density for any composition of the mixture can be obtained with a precision better than 0.5% from the pure compounds value. Now we simply apply Newton or Gladstone–Dale models, which relate the refractive index of a binary mixture with its density from the value of both pure components, without any fitting parameter. Both models are very similar in form and in the values they deduce (less than a 0.2% of difference), but while that of Newton performs slightly better for ethanol mixtures, the model of Gladstone–Dale gives some better results for aqueous mixtures. We think that these results can be extended to the majority of ionic liquid plus solvent systems.

Readability of Brochures Produced by State of Florida.

Science.gov (United States)

Christ, William G.; Pharr, Paula

1980-01-01

A study of the readability of governmental pamphlets produced by the State of Florida, based on the use of the Flesch Reading Ease Formula and the Dale-Chall Formula, suggests that if a seventh or eighth grade readability level is considered an appropriate standard for public information brochures, the brochures tested may be too complex…

Generation of Referring Expressions: Assessing the Incremental Algorithm

Science.gov (United States)

van Deemter, Kees; Gatt, Albert; van der Sluis, Ielka; Power, Richard

2012-01-01

A substantial amount of recent work in natural language generation has focused on the generation of "one-shot" referring expressions whose only aim is to identify a target referent. Dale and Reiter's Incremental Algorithm (IA) is often thought to be the best algorithm for maximizing the similarity to referring expressions produced by people. We…

Is It that Difficult to Find a Good Preference Order for the Incremental Algorithm?

Science.gov (United States)

Krahmer, Emiel; Koolen, Ruud; Theune, Mariet

2012-01-01

In a recent article published in this journal (van Deemter, Gatt, van der Sluis, & Power, 2012), the authors criticize the Incremental Algorithm (a well-known algorithm for the generation of referring expressions due to Dale & Reiter, 1995, also in this journal) because of its strong reliance on a pre-determined, domain-dependent Preference Order.…

Browse Title Index

African Journals Online (AJOL)

Items 51 - 100 of 165 ... Issue, Title. Vol 30 (2005), Digitisation projects at the University of Cape Town Libraries, Abstract. Janine Dunlop, Lesley Hart. Vol 24 (2002), DISA: an African Perspective on Digital Technology, Abstract. Michele Pickover, Dale Peters. Vol 30 (2005), Doing it right – or are we? Basic principles in the ...

Une nouvelle ouverture sur le monde pour les femmes | CRDI ...

International Development Research Centre (IDRC) Digital Library (Canada)

'appellent ailleurs dans le dédale d'étals et d'allées serrés. En plus de son travail sur le marché, Jertrudes est également secrétaire de l'association des femmes qui vendent sur ce marché. Le groupe est un endroit où elles ...

Depo Provera

African Journals Online (AJOL)

2008-11-13

Nov 13, 2008 ... 6. Rang HP, Dale MM, Ritter JM, Moore PK. Pharmacology. 5th ed. Edinburgh: Churchill Livingstone;. 2003. 7. Standring S (ed). Gray's anatomy. 39th ed. Edinburgh: Churchill Livingstone; 2005. 8. Cronjé HS, Grobler CJF. Obstetrics in Southern Africa. 2nd ed. Paarl: Van Schaik Publishers; 2003. 9. Nel JT.

Enhancing the Professionalism of Purchasing Agents (GS 1105s) within the Department of the Army.

Science.gov (United States)

1987-09-01

automated small purchase process offers distinct advantages, as well as cost savings in both time and money , for activities with a large volume of small...resident) Massasoit Northeast $1,888 $6,400 Boston, MA Broward Southeast 1,327 2,765 Ft. Lauder - dale, FL Rock Valley Midwest 1,728 7,552 Rockford, IL De

Ensuring Effective Governance. New Directions for Community Colleges, Number 49.

Science.gov (United States)

Deegan, William L., Ed.; Gollattscheck, James F., Ed.

1985-01-01

This collection of articles addresses major questions of community college governance and highlights some of the changes that have taken place in governance over the past decade. The issue contains: (1) "State Power in a New Era: Threats to Local Authority," by Dale Tillery and James L. Wattenbarger; (2) "Power on the Periphery: Faculty and…

Maritime Improvised Explosive Devices: A Threat Based Technology Study

Science.gov (United States)

2015-06-12

id/3078682/ns/technology_and_science- science/t/dolphins-go-front-lines-iraq-war/#.VPsmDZU5DIV. Carnegie , Dale , and Rita Kiley. 1948. How to Stop...Besides, if I let those things get me, I wouldn’t last long. ( Carnegie and Kiley 1948, 6) ― Admiral Ernest J. King Admiral King’s focus on

Full report of laser doppler velocimetry (Het-V) data, results , and analysis for pRad shot 0632

Energy Technology Data Exchange (ETDEWEB)

Tupa, Dale [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Tainter, Amy Marie [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

2016-06-21

This was a collaborative shot with AWE investigators Paul Willis-Patel, David Bell, Seth Grant, David Tarr, and James Richley. The shot was assembled in Los Alamos, after which David Bell set up the probe holder and finalized the alignment. The probe holder location and configuration was modified from previous years to make room for the laser illuminated visible imaging diagnostic. The LANL pRad PDV team was Dale Tupa, Amy Tainter, and Patrick Medina. This shot had three PDV probes: one aimed at the center, one aimed at a feature, one aimed at the reverse side of the shot. The shot also had 9 points of a spectroscopy diagnostic. The pRad team helped set up and field the spectroscopy, but did not help with any data analysis. (The support documentation for the PDV results includes a timing map for the spectroscopy.) Please direct questions on the velocimetry to Dale Tupa or Amy Tainter. The shot radiographs were classified, but the data from the optical diagnostics are not.

Cosmological singularities in string and M-theory cosmology

NARCIS (Netherlands)

Vazquez-Mozo, M.A.; Ibanez, J.

2000-01-01

I discuss the point of view that non-renormalizability in General Relativity is a consequence of dealing with a low-energy effective field theory of the gravitational field, and how Einstein-Brans-Dicke gravity is retrieved from string/M-theory at low energies. After examining the role of stringy

Total Quality Management: A Selected Bibliography

Science.gov (United States)

1993-03-01

1991) Zeithaml, Valarie A.; Parasuraman, A.; and Berry, Leonard L. DELIV- ERING QUALITY SERVICE: BALANCING CUSTOMER PERCEPTIONS AND EXPECTA- TIONS...August 1992, pp. 24-27. Danjin, Dick. "Will TQM Go the Way of QWL (Quality of Worklife )?" JOURNAL FOR QUALITY AND PARTICIPATION, Vol. 15, July-August

Utilization of Forward Error Correction (FEC) Techniques With Extensible Markup Language (XML) Schema-Based Binary Compression (XSBC) Technology

Science.gov (United States)

2004-12-01

NY 7. Erik Chaum NUWC Newport, RI 8. David Bellino NPRI Newport, RI 9. Dick Nadolink NUWC Newport, RI 10. VADM Roger Bacon (Ret...Science Advisor Pearl Harbor, HI 16. LT Andrew Hurvitz, USN FNMOC Monterey, CA 17. ENS Darin Keeter, USN FNMOC Monterey, CA 18. CAPT David

Vaxfectin (registered trademark) Enhances Both Antibody and In Vitro T Cell Responses to Each Component of a 5-gene Plasmodium falciparum Plasmid DNA Vaccine Mixture Administered at Low Doses

Science.gov (United States)

2010-01-01

received intramus- cular injections in the tibialis anterior muscle pDNA formu lated in PBS or Vaxfectin® using insulin syringes (0.3 ml: Becton Dick... phosphatidylcholine (DSPC) liposomes in Leishmania vaccine stud- ies and report long-term immunity in mice when the adjuvant was added with the

Turbulent Convection in an Anelastic Rotating Sphere: A Model for the Circulation on the Giant Planets

Science.gov (United States)

2008-06-01

Raffaele Ferrari, Adam Showman, Dick Lindzen, Baylor Fox-Keiper, Jonathan Lilly, Tapio Schneider, Carl Wunsch and Bill Hubbard. Particularly I thank Jean...Cuzzi, J., Pollack, J. B.. Danielson, G. E., Ingersoll, A., Davies, M. E., Hunt, G. E., Morrison, D., Owen, T.. Sagan , C., Veverka, J., Strom, R

Security Functions for a File Repository

NARCIS (Netherlands)

Helme, A.; Helme, Arne; Stabell-Kulo, Tage

1997-01-01

When personal machines are incorporated into distributed systems a new mixture of threats is exposed. The security effort in the MobyDick project is aimed at understanding how privacy can be protected in this new environment. Our claim is that a two-step process for authentication and authorisation

Beliefs and Attitudes of Secondary Agriculture Teachers about Global Agriculture Issues

Science.gov (United States)

Hurst, Sara D.; Roberts, T. Grady; Harder, Amy

2015-01-01

The purpose of this study was to explore the beliefs and attitudes of secondary agriculture teachers regarding global agricultural issues. A randomized national sample of 417 teachers were surveyed using a modified version of the International Agricultural Awareness and Understanding Survey (Wingenbach, Boyd, Lindner, Dick, Arispe, & Haba,…

Combining Performance and Flexibility for RMS with a Hybrid Architecture

NARCIS (Netherlands)

Dennis Koole; Arjan Groenewegen; Daniël Telgen; Patrick Wit; Leo van Moergestel; Arjan van Zanten; John-Jules Meyer; Ing. Erik Puik; Dick van der Steen; Pascal Muller

2013-01-01

Author supplied Combining Performance and Flexibility for RMS with a Hybrid Architecture Dani¨el Telgen 12? , Leo van Moergestel 1 , Erik Puik 1 , Pascal Muller 1 , Arjan Groenewegen 1 , Dick van der Steen 1 , Dennis Koole 1 , Patrick de Wit 1 , Arjen van Zanten 1 , and John-Jules

Piitsa ja prääniku Venemaa-poliitika / Jeroen Bult

Index Scriptorium Estoniae

Bult, Jeroen

2006-01-01

Samal ajal kui USA on Venemaa suhtes võtmas kriitilisemat seisukohta, mida näitas ka USA asepresidendi Dick Cheney kõne mai alguses Musta mere ja Balti riikide konverentsil, välistavad Saksamaa majandushuvid ja tasakaalukas välispoliitika igasuguse toetuse USA karmistuvale hoiakule Venemaa suhtes. Lisa: Etteheited

The Evolution of Soviet Requirements for Naval Forces - Solving the Problems of the Early 1960s.

Science.gov (United States)

1982-12-01

the military sector ) or more than that response (additional factors having served as stimuli). And even where the magnitude of expenditures for...34Alternative Approaches to Attrition Utgoff. Kathy and Thaler, Dick, "The Economicos of Multi Year Minagemont," 30 pp., Jan 1982 (Iontracting," 47 pp

Linearized modified gravity theories with a cosmological term: advance of perihelion and deflection of light

Science.gov (United States)

Özer, Hatice; Delice, Özgür

2018-03-01

Two different ways of generalizing Einstein’s general theory of relativity with a cosmological constant to Brans–Dicke type scalar–tensor theories are investigated in the linearized field approximation. In the first case a cosmological constant term is coupled to a scalar field linearly whereas in the second case an arbitrary potential plays the role of a variable cosmological term. We see that the former configuration leads to a massless scalar field whereas the latter leads to a massive scalar field. General solutions of these linearized field equations for both cases are obtained corresponding to a static point mass. Geodesics of these solutions are also presented and solar system effects such as the advance of the perihelion, deflection of light rays and gravitational redshift were discussed. In general relativity a cosmological constant has no role in these phenomena. We see that for the Brans–Dicke theory, the cosmological constant also has no effect on these phenomena. This is because solar system observations require very large values of the Brans–Dicke parameter and the correction terms to these phenomena becomes identical to GR for these large values of this parameter. This result is also observed for the theory with arbitrary potential if the mass of the scalar field is very light. For a very heavy scalar field, however, there is no such limit on the value of this parameter and there are ranges of this parameter where these contributions may become relevant in these scales. Galactic and intergalactic dynamics is also discussed for these theories at the latter part of the paper with similar conclusions.

Genetic variation reveals influence of landscape connectivity on population dynamics and resiliency of western trout in disturbance-prone habitats

Science.gov (United States)

Helen M. Neville; R. E. Gresswell; J. B. Dunham

2012-01-01

Salmonid fishes have evolved and persisted in dynamic ecosystems (Waples and others 2008) where disturbance events vary in frequency, magnitude, timing, and duration (Gresswell 1999; Dale and others 2001), as well as the specific nature of associated effects (e.g., changes in thermal or flow regimes, geomorphology, or water chemistry; Reeves and others 1995; Benda and...

75 FR 56028 - Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition to List Sprague's...

Science.gov (United States)

2010-09-15

... average. To date, we estimate that 12,400 ha (30,522 ac) have been impacted by 752 wind turbines and...). It is one of the few bird species endemic to the North American prairie. The closest living relative... described as ``one of the least known birds in North America'' (Robbins and Dale 1999, p. 1), and range-wide...

Got Web 2.0? A Review of Web 2.0 Tools for the Information Systems Curriculum

Science.gov (United States)

Sendall, Patricia; Ceccucci, Wendy; Peslak, Alan R.

2010-01-01

This paper discusses the importance of incorporating Web 2.0 technologies across the Information Systems (IS) curriculum. The Web 2.0 paradigm is not new; although the term itself was coined in 2004 by Dale Dougherty of O'Reilly Media, Inc., (Anderson, 2007) the concept of a collaborative workspace was the original vision of Tim Berners-Lee, the…

An Old Dog and New Tricks

Science.gov (United States)

Hinshaw, Craig

2011-01-01

Glass as an art form is anything but new. Three thousand years ago the Egyptians were molding glass beads and shaping elegant glass perfume bottles. In this article, the author describes how his students created sun catchers inspired by the beauty of Notre Dame's stained glass windows and the intrigue of Dale Chihuly's sculptures. (Contains 1…

1051 Ergs: The Evolution of Shell Supernova Remnants

Science.gov (United States)

1997-11-15

Gloria Dubner Instituto de Astronomia y Fisica del Espacio , Buenos Aires, Argentina Dale A. Frail National Radio Astronomy Observatory, Socorro, NM...Instituto de Astronomia y Fisica del Espacio , Argentina Dwarkadas, Vikram V.* University of Washington Dyer, Kristy K.* North Carolina State University...Carolina State University Yusef-Zadeh, Farhad* Northwestern University Zhang, X.* Beijing Astronomical Observatory, China Zheng, Y . Beijing

Intensive management – can the South really live without it?

Science.gov (United States)

James M. Guldin; T. Bently Wigley

1998-01-01

Over the past five years, the public and private sectors have debated the future of forest management and its implications for the next century. In the public sector, resource managers have debated the meaning and significance of "ecosystem management," a term coined in 1992 by then-Forest Service Chief F. Dale Robertson; he suggested that this approach to...

'people queued for hours to see him'.

Science.gov (United States)

Carlisle, Daloni

2012-05-30

I met Khalil Dale (pictured) in 1995 when writing about the International Committee of the Red Cross (ICRC) campaign to end the use of landmines. I spent a week alongside him, reporting on his work for the ICRC in northern Afghanistan. Khalil was a gentle, quiet man who left a big impression on everyone who met him.

Alternative modalities – A Review of Graphic Encounters: Comics and the Sponsorship of Multimodal Literacy

Directory of Open Access Journals (Sweden)

Aaron Scott Humphrey

2014-05-01

Full Text Available Research exploring the multimodal characteristics of comics has recently flourished, and Dale Jacobs has been one of the early prolific authors on this topic. Jacobs expands these ideas further in 'Graphic Encounters: Comics and the Sponsorship of Multimodal Literacy', a monograph which engages with theories of multimodality, but shifts its focus primarily to literacy sponsorship.

How Could Foreign Teachers in Turkey Pronounce Their Turkish Students' Names Correctly

Science.gov (United States)

Yurtbasi, Metin

2016-01-01

Most of us have read Dale Carnegie's classic "How to make friends and influence people" in which he reveals the secret of human psychology: giving people the "feeling of importance" that they seek. He claims in that work that people feel more friendly toward those who allows them this feeling by caring about them and showing…

Existence of a ground state for the confined hydrogen atom in non-relativistic QED

DEFF Research Database (Denmark)

Amour, Laurent; Faupin, Jeremy

2008-01-01

We consider a system of a hydrogen atom interacting with the quantized electromagnetic field. Instead of fixing the nucleus, we assume that the system is confined by its center of mass. This model is used in theoretical physics to explain the Lamb-Dicke effect. After a brief review of the literat...

Re-Seeing "The Mighty": Critically Examining One Film's Representations of Disability in the English Classroom

Science.gov (United States)

Maples, Joellen; Arndt, Katrina; White, Julia M.

2010-01-01

Films portraying characters with disabilities are often shown in the English classroom. Films such as "Of Mice and Men," "Simon Birch," "To Kill a Mockingbird," "The Hunchback of Notre Dame," "The Glass Menagerie," "Moby Dick," "Gattaca," and "A Beautiful Mind" often show simplistic and stereotypical representations of characters and their…

Test particle trajectories near cosmic strings

Indian Academy of Sciences (India)

We present a detailed analysis of the motion of test particle in the gravitational field of cosmic strings in different situations using the Hamilton–Jacobi (H–J) formalism. We have discussed the trajectories near static cosmic string, cosmic string in Brans–Dicke theory and cosmic string in dilaton gravity.

Critical Studies in Teaching and Learning - Vol 2, No 2 (2014)

African Journals Online (AJOL)

Using Wikis to Teach History Education to 21st Century Learners: A Hermeneutic Perspective · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. Dorothy Sebbowa, Dick Ng'ambi, Cheryl Brown, 24-48. http://dx.doi.org/10.14426/cristal.v3i1 ...

Effect of Combined Application of Organic and Mineral Nitrogen and ...

African Journals Online (AJOL)

mite

fertilizers is not sufficient to maintain the present levels of crop productivity of ...... Proceedings of the First Barley Review work shop, 16- 19 October 1993. ... Life. Science Journal, 4 (2): 82-87. Iyamuremye, F & Dick, R.P. 1996. Organic .... inorganic fertilizer application on soil physico-chemical properties and nutrient balance.

The influence of the counter-rotating terms on the superradiant emission

International Nuclear Information System (INIS)

Seke, J.

1984-01-01

Agarwal's master equation for the Dicke model is modified by including the counter-rotating terms. By solving the corresponding equations of motion for the atomic expectation values, it is shown that the counter-rotating terms play an important role in the time evolution of the population inversion and radiation rate

Diversity in the Workplace.

Science.gov (United States)

1996

This document contains three papers presented at a symposium on diversity in the workplace moderated by Sandra Johnson at the 1996 conference of the Academy of Human Resource Development (AHRD). "Diversity and Development: An Assessment of Equal Opportunities and the Role of HRD in the Police Service" (Rashmi Biswas, Penny Dick) examines…

Resonance – Journal of Science Education | Indian Academy of ...

Indian Academy of Sciences (India)

Home; Journals; Resonance – Journal of Science Education; Volume 16; Issue 4. Cosmology, Mach's Principle and Relativity. R H Dicke. Classics Volume 16 Issue 4 April 2011 pp 372-391. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/016/04/0372-0391. Author Affiliations.

Pramana – Journal of Physics | Indian Academy of Sciences

Indian Academy of Sciences (India)

Brans–Dicke scalar–tensor theory provides a conformal coupling of the scalar field with gravity in Einstein's frame. This model is equivalent to an interacting quintessence in which dark matter is coupled to dark energy. This provides a natural mechanism to alleviate the coincidence problem. We investigate the dynamics of ...

Jüri Tamm: vaid osaledes on võimalik silma vaadata ja mõista oksjoni mõtet / toimetanud Kristi Vahemaa

Index Scriptorium Estoniae

Tamm, Jüri, 1937-

2011-01-01

Oksjoni idee autor ja korraldaja Jüri Tamm 4.12.2011 toimuvast 12. heategevuslikust kunstioksjonist, mille tulud lähevad hukkunud sportlaste laste toetuseks. Tänavune väliskülaline on kõrgushüppaja Dick Fosbury. Müügile tulevate taieste nimekiri. Tagasivaade oksjonitele. Koostööd tehakse galeriiga Rios

Dømmer jeg - eller er jeg vågen?

DEFF Research Database (Denmark)

Hedegaard, Karen Marie

2014-01-01

filosofi. Fra den pædagogiske filosofi inddrages Herbart, Erling Lars Dale og Gert Biesta, og endelig inddrages et sociologisk blik på institutionel dømmekraft. Artiklen bygger på et FoU-projekt om praktik og praksislæring og en undersøgelse om lærerstuderendes udvikling af dømmekraft og skøn, som der...

Dashboard Videos

Science.gov (United States)

Gleue, Alan D.; Depcik, Chris; Peltier, Ted

2012-01-01

Last school year, I had a web link emailed to me entitled "A Dashboard Physics Lesson." The link, created and posted by Dale Basier on his "Lab Out Loud" blog, illustrates video of a car's speedometer synchronized with video of the road. These two separate video streams are compiled into one video that students can watch and analyze. After seeing…

Appendix 2: Risk-based framework and risk case studies. Risk assessment for wildfire in the Western United States.

Science.gov (United States)

David L. Peterson; Jeremy S. Littell

2012-01-01

Wildfire is one of the two most significant disturbance agents (the other being insects) in forest ecosystems of the Western United States, and in a warmer climate, will drive changes in forest composition, structure, and function (Dale et al. 2001, McKenzie et al. 2004). Although wildfire is highly stochastic in space and time, sufficient data exist to establish clear...

Reference: 193 [Arabidopsis Phenome Database[Archive

Lifescience Database Archive (English)

Full Text Available 193 http://metadb.riken.jp/db/SciNetS_ria224i/cria224u4ria224u15772667i Peiter Edgar et al. 2005 Mar. Natur...ation and stomatal movement. 7031 404-8 15772667 2005 Mar Nature Hetherington Alistair M|Knight Heather|Maathuis Frans J M|Mills Lewis N|Peiter Edgar|Pelloux J辿r担me|Sanders Dale

Predicting Pilot Retention

Science.gov (United States)

2012-06-15

forever… Gig ‘Em! Dale W. Stanley III vii Table of Contents Page Acknowledgments...over the last 20 years. Airbus predicted that these trends would continue as emerging economies , especially in Asia, were creating a fast growing...US economy , pay differential and hiring by the major airlines contributed most to the decision to separate from the Air Force (Fullerton, 2003: 354

Review of Department of Defense Education Activity (DODEA) Schools. Volume I: Main Report and Appendixes

Science.gov (United States)

2000-10-01

extracted.1 Hanushek in 1971 investigated the relationship between the achievement of California third graders and the characteristics of their second...Dale Ballou and Michael Podgursky, Teacher Pay and Teacher Quality (Kalamazoo, Michigan: W.E. Upjohn Institute, 1997), p. 9. 2 Eric Hanushek ...Carolina and Texas, National Education Goals Panel, November 1998 Hanushek , Eric A., “Teacher Characteristics and Gains in Student Achievement

Scalar field as an intrinsic time measure in coupled dynamical matter-geometry systems. II. Electrically charged gravitational collapse

Science.gov (United States)

Nakonieczna, Anna; Yeom, Dong-han

2016-05-01

Investigating the dynamics of gravitational systems, especially in the regime of quantum gravity, poses a problem of measuring time during the evolution. One of the approaches to this issue is using one of the internal degrees of freedom as a time variable. The objective of our research was to check whether a scalar field or any other dynamical quantity being a part of a coupled multi-component matter-geometry system can be treated as a `clock' during its evolution. We investigated a collapse of a self-gravitating electrically charged scalar field in the Einstein and Brans-Dicke theories using the 2+2 formalism. Our findings concentrated on the spacetime region of high curvature existing in the vicinity of the emerging singularity, which is essential for the quantum gravity applications. We investigated several values of the Brans-Dicke coupling constant and the coupling between the Brans-Dicke and the electrically charged scalar fields. It turned out that both evolving scalar fields and a function which measures the amount of electric charge within a sphere of a given radius can be used to quantify time nearby the singularity in the dynamical spacetime part, in which the apparent horizon surrounding the singularity is spacelike. Using them in this respect in the asymptotic spacetime region is possible only when both fields are present in the system and, moreover, they are coupled to each other. The only nonzero component of the Maxwell field four-potential cannot be used to quantify time during the considered process in the neighborhood of the whole central singularity. None of the investigated dynamical quantities is a good candidate for measuring time nearby the Cauchy horizon, which is also singular due to the mass inflation phenomenon.

the effect of various levels of dietary copper and molybdenum on ...

African Journals Online (AJOL)

ruminant body (Dick. 1954). Hepatic Cu levels can therefore be used to indicate the Cu status of animals, eg. concentrations below 20 mg Cu/ kg dry liver could be indicative of Cu deficiency (MacPherson, Brown &. Hemingway, 1964), while liver Cu levels above 600 mg/ kg DM may indicate a potential Cu toxicity situa-.

Resonance – Journal of Science Education | Indian Academy of ...

Indian Academy of Sciences (India)

Home; Journals; Resonance – Journal of Science Education; Volume 16; Issue 4. Issue front cover thumbnail Issue back cover thumbnail. Volume 16, Issue 4. April 2011, pages 297-406. pp 297-298 Editorial. Editorial · Vasant Natarajan · More Details Fulltext PDF. pp 299-301 Article-in-a-Box. Robert H. Dicke – Physicist ...

Do exoskeletons dream of plastic sleep?. Comment on "The embodiment of assistive devices-from wheelchair to exoskeleton" by M. Pazzaglia and M. Molinari

Science.gov (United States)

Ferrara, Michele; Tempesta, Daniela; De Gennaro, Luigi

2016-03-01

In the science fiction novel by Philip K. Dick ;Do Androids Dream of Electric Sheep?; [2] Blade Runners used a polygraph-like machine to determine if an individual was a replicant, by measuring his/her empathetic responses. Although made of biological materials and physically indistinguishable from humans, androids were considered to be pieces of machinery.

Euroopa Nõukogu uuring kinnitas kahtlusi CIA salavanglate kohta / Krister Paris

Index Scriptorium Estoniae

Paris, Krister, 1977-

2005-01-01

Võimalikku salavanglate olemasolu Euroopas uurinud Šveitsi poliitik Dick Marty on seisukohal, et tõenäoliselt väikesed salavanglad olid Euroopas, kuid neis olnud vangid viidi ära kohe pärast meedias esinenud paljastusi. Lisa: Europarlament tahab täit tõde. Vt. samas: Salavanglate skandaali uurimine käib mitmel rindel

Regularity and chaos in cavity QED

International Nuclear Information System (INIS)

Bastarrachea-Magnani, Miguel Angel; López-del-Carpio, Baldemar; Chávez-Carlos, Jorge; Lerma-Hernández, Sergio; Hirsch, Jorge G

2017-01-01

The interaction of a quantized electromagnetic field in a cavity with a set of two-level atoms inside it can be described with algebraic Hamiltonians of increasing complexity, from the Rabi to the Dicke models. Their algebraic character allows, through the use of coherent states, a semiclassical description in phase space, where the non-integrable Dicke model has regions associated with regular and chaotic motion. The appearance of classical chaos can be quantified calculating the largest Lyapunov exponent over the whole available phase space for a given energy. In the quantum regime, employing efficient diagonalization techniques, we are able to perform a detailed quantitative study of the regular and chaotic regions, where the quantum participation ratio (P R ) of coherent states on the eigenenergy basis plays a role equivalent to the Lyapunov exponent. It is noted that, in the thermodynamic limit, dividing the participation ratio by the number of atoms leads to a positive value in chaotic regions, while it tends to zero in the regular ones. (paper)

Slow nucleation rates in chain inflation with QCD axions or monodromy

International Nuclear Information System (INIS)

Ashoorioon, Amjad; Freese, Katherine; Liu, James T.

2009-01-01

The previous proposal (by two of us) of chain inflation with the QCD axion is shown to fail. The proposal involved a series of fast tunneling events, yet here it is shown that tunneling is too slow. We calculate the bubble nucleation rates for phase transitions in the thick wall limit, approximating the barrier by a triangle. A similar problem arises in realization of chain inflation in the string landscape that uses series of minima along the monodromy staircase around the conifold point. The basic problem is that the minima of the potential are too far apart to allow rapid enough tunneling in these two models. We entertain the possibility of overcoming this problem by modifying the gravity sector to a Brans-Dicke theory. However, one would need extremely small values for the Brans-Dicke parameter in the early universe. Many successful alternatives exist, including other axions (with mass scales not set by QCD) or potentials with comparable heights and widths that do not suffer from the problem of slow tunneling and provide successful candidates for chain inflation.

Quantum coherence: Reciprocity and distribution

Energy Technology Data Exchange (ETDEWEB)

Kumar, Asutosh, E-mail: asukumar@hri.res.in [Harish-Chandra Research Institute, Allahabad-211019 (India); Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094 (India)

2017-03-18

Quantum coherence is the outcome of the superposition principle. Recently, it has been theorized as a quantum resource, and is the premise of quantum correlations in multipartite systems. It is therefore interesting to study the coherence content and its distribution in a multipartite quantum system. In this work, we show analytically as well as numerically the reciprocity between coherence and mixedness of a quantum state. We find that this trade-off is a general feature in the sense that it is true for large spectra of measures of coherence and of mixedness. We also study the distribution of coherence in multipartite systems by looking at monogamy-type relation–which we refer to as additivity relation–between coherences of different parts of the system. We show that for the Dicke states, while the normalized measures of coherence violate the additivity relation, the unnormalized ones satisfy the same. - Highlights: • Quantum coherence. • Reciprocity between quantum coherence and mixedness. • Distribution of quantum coherence in multipartite quantum systems. • Additivity relation for distribution of quantum coherence in Dicke and “X” states.

Mis on elus olulisim / Aita Kivi

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Kivi, Aita, 1954-

2002-01-01

Sisu : Mitch Albom. Teisipäevad Morrie'ga; Santa Montefiore. Oota mind ombupuu all; Ridley Pearson. Tont teab kus; Sebastian Faulks. Linnulaul; Kerttu Rakke. Iluasjake; Merike Hanni. Kooliraha; Viivi Luik. Ajaloo ilu; Hermann Hesse. Stepihunt; Eesti luulet läbi aegade / [koostanud Marika Vingissar; Philip K. Dick. Ubik; Marion Zimmer Bradley. Avaloni udud; Kuus eesti luuletajat / koostanud Anne Lange

USA otsib Iraanist aktiivselt tuumainfot / Neeme Raud

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Raud, Neeme, 1969-

2005-01-01

Iraan avaldas protesti USA luurelendude üle Iraani kohal. USA endine kaitseminister James Baker peab Iraani ja Põhja-Koreaga nende tuumaprogrammide hävitamiseks sõja alustamist suurimaks veaks. Kuigi Bushi meeskond rõhutab vajadust lahendada küsimus rahumeelselt, toovad Dick Cheney' ja Condoleezza Rice'i avaldused mitme USA kommentaatori arvates meelde Iraagi sõja eelse taktika

2016 CEC Annual Workshop on Electrochemistry

Science.gov (United States)

2016-08-31

rate constant ever recorded in electrochemical experiments. 12 Poster Session Caleb Alexander & Will Hardin Synthesis of...Growth with TOF-SIMS Paul DeGregory Quantitative Electrochemical Metalloimmunoassay for TFF3 in Urine using a Paper Analytical Device Jeffrey Dick...Robin Forslund Nanostructured LaNiO3 Perovskite Electrocatalyst for Enhanced Urea Oxidation Jerzy Gazda Advances in Energy Storage: Lithium-ion

Radical 10-point plan to refocus NHS estate.

Science.gov (United States)

Ellis, Conor; Baldwin, Ed; Dick, Rachel

2010-11-01

Conor Ellis, head of health, Ed Baldwin, partner, and Rachel Dick, consultant, at international built asset consultancy EC Harris, present a "10-step guide" to help the NHS achieve radical efficiency savings, optimise the use of its estate, maximise the value of under-utilised land, buildings, and other assets, and harness better value from its existing FM operations.

I'll Save the World from Global Warming--Tomorrow: Using Procrastination Management to Combat Global Warming

Science.gov (United States)

Malott, Richard W.

2010-01-01

In the provocatively titled "I'll Save the World from Global Warming--Tomorrow," Dick Malott says that although we all want to do the right thing to help the environment, whether it's buying and installing compact fluorescent light bulbs (CFLs) or replacing an energy-guzzling appliance with a more efficient one, we put it off because there's no…

Une histoire des mathématiques routes et dédales

CERN Document Server

Dahan-Dalmedico, Amy

1986-01-01

L'histoire des mathématiques est celle des conjectures, des hésitations, des impasses, des modèles concurrents, des intuitions fulgurantes, des synthèses théoriques... La naissance et le développement de l'activité mathématique sont ici replacés dans leur contexte historique et leur environnement culturel, économique et institutionnel. Le cadre est ainsi fixé pour l'étude précise de différents thèmes : équations, espace, limite, fonctions, lois, opérations ; notions fondamentales auxquelles tout élève, étudiant, enseignant est confronté. Les mathématiques ne se présentent pas, ici, comme un corps figé d'axiomes, théorèmes, lemmes et corollaires ; elles tissent une toile en devenir qui suscite bien des curiosités.

Engineering Evaluation and Assessment (EE and A) Report for the Symbolic and Sub-symbolic Robotics Intelligence Control System (SS-RICS)

Science.gov (United States)

2018-04-01

ARL-TR-8352 ● APR 2018 US Army Research Laboratory Engineering Evaluation and Assessment (EE&A) Report for the Symbolic and Sub...APR 2018 US Army Research Laboratory Engineering Evaluation and Assessment (EE&A) Report for the Symbolic and Sub-symbolic Robotics...Intelligence Control System (SS-RICS) by Troy Dale Kelley and Eric Avery Human Research and Engineering Directorate, ARL Sean McGhee STG Inc

CrossTalk: The Journal of Defense Software Engineering. Volume 25, Number 4, July/August 2012

Science.gov (United States)

2012-08-01

numbers look good, but the people have legitimate reasons for objection, the orga- nization must consider their viewpoint. Malcolm Gladwell said it well...BrainyQuote.com 32. Santayana, George. Quotationspage.com. Retrieved September 28, 2011, from quotationspage.com 33. Gladwell , Malcolm ...Belt, and a trained Malcolm Baldrige National Quality Award examiner. Dale is an SEI af- filiate and the CEO of Double Play Process Diagnostics, Inc

Plastitööstus toob jõukust hiidlase õuele / Mart Raudsaar

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Raudsaar, Mart, 1973-

2006-01-01

Ilmunud ka: HEI, 2006/Sep, nr. 3, lk. 11-12. Hiiumaal asuvatest plastitööstuse ettevõtetest AS Dale LD, EstPak Plastik AS ja AS M ja P Nurst. Lisa: Hiiumaa plastiettevõtted. Vt. samas: Plastitööstust jagub ka Hiiumaa pealinna; Hiiumaa plastitööstuse arengut pärsib tööjõunappus; Dagöplast valmistab Käinas kiletooteid

The origins of the birth control movement in England in the early nineteenth century.

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Langer, W L

1975-01-01

The origins of the birth control movement in England in the 19th cen tury are discussed. The impact of Malthus's "Essay on the Principle of Population" and the activities of such thinkers and reformers as Jermy Bentham, James and John Stuart Mill, Francis Plance, Richard Carlile, Robert Dale Owen, and Charles Knowlton are discussed. The social debate that arose during the century is discussed.

SERDP Ecosystem Management Project (SEMP): 2004 Technical Report

Science.gov (United States)

2006-06-01

William D. Goran, ERDC/CERL Dr. Anthony J. Krzysik, Prescott College Dr. David L. Price, ERDC/EL Dr. K. Ramesh Reddy, University of Florida Dr...Construction Engineering Research Lab/ Prescott College, and Oak Ridge Na- tional Lab) were selected to begin multiyear research initiatives against this...Environmental Technology, University of Tennessee — Soil microbiology ; Virginia Dale, Dan Druckenbrod, and Suzanne Beyeler§, Environmental Sciences

Manpower Planning in the Zimbabwe Public Sector: A Myth or Reality?

Science.gov (United States)

1994-09-01

demands accurate worker data and the coordination of the management development function. (Robbins, 1984) 201n his book, Principles of Management , J...Ahuja, K. K., Personnel Management : Kalyani Publishers, New Dehli , 1983. 2. Beach, Dale, S., Personnel Management : The Management of People at Work...1215 Jefferson Davis Highway. Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188

Patterns of deviation in Niyi Osundare's poetry | Dick | Mgbakoigba ...

African Journals Online (AJOL)

Log in or Register to get access to full text downloads. ... A critical stylistic study of the poetry of Niyi Osundare from Nigeria reveals that he has made an exemplary ... deviate from norms and conventions of language thereby creating aesthetics ...

BKR 27(1) pp. xx-xx (Dick et al)

African Journals Online (AJOL)

Femi J. Olorunniji

2015-03-31

Mar 31, 2015 ... Antibiotic sensitivity profiles of the bacteria (Escherichia coli, Vibrio sp. and Salmonella sp.) ..... of Vibrio parahaemolyticus isolated from cockles in Padang, ... potentially pathogenic Halophilic Vibrios isolated from seafood.

Chaos in the Dicke model: quantum and semiclassical analysis

International Nuclear Information System (INIS)

Bastarrachea-Magnani, Miguel Angel; Hirsch, Jorge G; López-del-Carpio, Baldemar; Lerma-Hernández, Sergio

2015-01-01

The emergence of chaos in an atom-field system is studied employing both semiclassical and numerical quantum techniques, taking advantage of the algebraic character of the Hamiltonian. A semiclassical Hamiltonian is obtained by considering the expectation value of the quantum Hamiltonian in Glauber (for the field) and Bloch (for the atoms) coherent states. Regular and chaotic regions are identified by looking at the Poincaré sections for different energies and parameter values. An analytical expression for the semiclassical energy density of states is obtained by integrating the available phase space, which provides an exact unfolding to extract the fluctuations in the level statistics. Quantum chaos is recognized in these fluctuations, as a function of the coupling strength, for different regions in the energy spectrum, evaluating the Anderson–Darling (A–D) parameter, which distinguishes the Wigner- or Poisson-like distributions. Peres lattices play a role similar to the Poincaré section for quantum states. They are calculated employing efficient numerical solutions and are a powerful visual tool to identify individual states belonging to a regular or chaotic region, classified by utilizing the Poincaré sections and the A–D parameter. Finally, the quantum Husimi function for selected excited states is shown to have a noticeable similitude with the Poincaré sections at the same energy. (invited comment)

Dick Lord Covos Books: Johannesburg, 1998 215 pagcs illustrated ...

African Journals Online (AJOL)

the adventures of mountain climbing and skiing; from the icy Antarctic to the scotching heat of Namibia and ... that few have ever heard of; from the joy of another life saved to the sadness of one that could not be saved. ... read it only because of the sheer human ingenuity that Lord so eloquently conveys. Despite Lord's ...

Carl Woese, Dick Young, and the roots of astrobiology.

Science.gov (United States)

Rummel, John D

2014-01-01

The beginning of the space age in the late 1950s gave rise to innovative and interdisciplinary research concepts and perspectives, including the concept of "exobiology" as a way to approach the fundamental aspects of biology through a study of life outside of the Earth, if it existed. This concept was embodied by NASA into its formal Exobiology Program and into the philosophy of the program both before and after the Viking missions that were launched to Mars to search for signs of life in 1975. Due to both management flexibility and an acceptance of the interdisciplinary nature of the problem of "life in the universe," NASA program managers, and particularly Richard S Young who ran the Exobiology Program beginning 1967, have made some excellent investments in paradigm altering science of great use both on Earth and on future space missions. The work of Carl Woese is one such example, which has revolutionized our understanding of the microbial world and the relationships of all life on Earth.

Best linear decoding of random mask images

International Nuclear Information System (INIS)

Woods, J.W.; Ekstrom, M.P.; Palmieri, T.M.; Twogood, R.E.

1975-01-01

In 1968 Dicke proposed coded imaging of x and γ rays via random pinholes. Since then, many authors have agreed with him that this technique can offer significant image improvement. A best linear decoding of the coded image is presented, and its superiority over the conventional matched filter decoding is shown. Experimental results in the visible light region are presented. (U.S.)

Eesti on USA uus lemmik / Argo Ideon

Index Scriptorium Estoniae

Ideon, Argo, 1966-

2007-01-01

President Toomas Hendrik Ilvese visiidist Washingtoni, kohtumistest USA presidendi George W. Bushi, asepresident Dick Cheney, asevälisminister John Negroponte, kaitseminister Robert M. Gates'i, USA Kongressi esindajatekoja spiikri Nancy Pelosi ja kongresmenidega. Eestil õnnestus korraldada USA pealinnas kohtumised, mille järjekorras ootab hulk palju suuremaid riike. Vabariigi President töövisiidil Ameerika Ühendriikides 25.-26.06.2007

Summary of Skoda JS rod drop measurements analysis

International Nuclear Information System (INIS)

Svarny, J.; Krysl, V.

1999-01-01

A summary is presented of the Skoda JS rod drop reactivity measurements analysis provided during last two years based on control rod worth measurements by the outer ion chambers. Standard analysis based on comparisons of dynamics macrocode MOBY-DICK-SK and experimental data is extended to the 8-th group delayed neutron structure and new features of rod drop process are investigated. (author)

"I Don't Like Hearing Angel and Not Seeing Her! Why Did We Do That?" An Exploration of Students' Media Literacy Development through Production

Science.gov (United States)

Luchs, Michele; Emery, Winston

2004-01-01

In this exploratory case study we look at student media production to find out what students know and have learned about the media through production work. We used a media education conceptual framework developed by Dick as a means of describing the day to day media learning of a group of ten students, four girls and six boys, producing a video…

The Crystal Set

Science.gov (United States)

Greenslade, Thomas B., Jr.

2014-01-01

In past issues of this journal, the late H. R. Crane wrote a long series of articles under the running title of "How Things Work." In them, Dick dealt with many questions that physics teachers asked themselves, but did not have the time to answer. This article is my attempt to work through the physics of the crystal set, which I thought…

Scalar-tetrad theories of gravity

International Nuclear Information System (INIS)

Hayward, J.

1981-01-01

A general theory of gravitation is constructed using a tetrad and a scalar field. The resulting theory, called a scalar-tetrad theory, does not contain Einstein's or the Brans-Dicke theories as special cases. However, there is a range of scalar-tetrad theories with the same post-Newtonian limit as Einstein's theory. Two particular models are interesting because of their simplicity. (author)

Muslim Prison Ministry: Hindering the Spread of the Radical, Militant, Violent and Irreconcilable Wing of Islam

Science.gov (United States)

2006-05-25

radical, militant, violent and irreconcilable wing of Islam Approved by: __________________________________ Monograph Director Timothy L . Challans, Ph.D...Honorable Harley Lapin (BOP), Dr. Michael Waller (Institute of World Politics), Mr. Paul Rogers (ACCA), and Mr. A. J. Sabree (ACCA). 78 Ibid., 12...London, United Kingdom: Verso books, 2005. Patai, Raphael. The Arab Mind, Long Island City, NY: Hatherleigh Press, 2002. Pederson , Dick. Defeating

Development and Application of a Physiological-based Framework for Assessing the Biological Significance of Military Activities on Threatened and Endangered Animal Species

Science.gov (United States)

2009-03-17

scrub and slash pine flatwoods. J. Herpetology 25:317-321. Brode, E.E. 1959. Notes on the behavior of Gopherus polyphemus. Herpetologica 15:101-102...Gopherus polyphemus, in northeastern Florida. J. Herpetology 30:14-18. Dale, V.H., S.C. Beyeler, and B. Jackson. 2002. Understory vegetation...Interior, National Biological Survey. Diemer, J.E. 1992. Demography of the tortoise Gopherus polyphemus in Northern Florida. J. Herpetology 26:281-289

Anti-Americanism: A Perfect Addition to a Russian Authoritarian’s Political Toolbox

Science.gov (United States)

2013-12-01

and Putin responding with poultry embargos, claiming America was intentionally selling Russians tainted chicken.96 NATO expansion further into... Thomas Remington, Vladimir Putin effectively subjugated the Parliament and ushered in “a party system in which United Russia dominates regional and...a Weak State, 5–7. 224 Thomas Remington, “Parliament and the Dominant Party Regime,” in After Putin’s Russia, ed Stephen Wegren and Dale Herspring

Political mechanisms of democratization in modern Ukraine

Directory of Open Access Journals (Sweden)

I. A. Tsurkanova

2014-07-01

Today, the political situation in Ukraine, strongly suggests that Ukrainian society is still prevalent understanding of the revolutionary democracy as freedom­destroying. However, in assessing the possible existence of democracy in modern conditions of development of Ukraine, among other principles, it is necessary to consider that in any case it should seek fundamental values and ideals not overseas ­ for the dales, and the private Ukrainian political history and culture.

Policy Analysis in National Security Affairs: New Methods for a New Era

Science.gov (United States)

2006-01-01

Basic Books, 1982); Lee S. Friedman, Microeconomic Policy Analysis (New York: McGraw-Hill, 1984); Duncan Macrae, Jr., and Dale Whittington , Expert...that part of the an- swer lies in scuttling the Stryker brigades and the FCS effort, but this step would deprive the Army of main transformation...about whether too many soldiers were being allocated to logistic support, depriving the U.S. Army and European forces of adequate combat formations

Finding of No Significant Impact (FONSI) for Construction of a Base Civil Engineer Complex at Travis Air Force Base, California

Science.gov (United States)

2002-01-26

2 Ellis Drive Dix o n A v e Rags dale Stree t Bioremedial Site Base Civil Engineering ComplexEnvironmental AssessmentTravis Air Force Base...CNPS List 1B species. This species is an annual herb in the sunflower tribe (Heliantheae) of the sunflower family (Asteraceae). Individual plants...range from approximately 10 to 40 centimeters (cm) tall. Being in the sunflower family (Asteraceae), the characteristic yellow flower of this plant

Navy Force Structure and Shipbuilding Plans: Background and Issues for Congress

Science.gov (United States)

2014-08-01

missions described in the DSG [Defense Strategic Guidance]. There are numerous ways to adjust Navy’s portfolio of programs to meet the BCA revised...balance of force structure (current and future), modernization and personnel within our portfolio , continued compliance with the BCA revised...Catherine Dale and Pat Towell. See also CRS Report R42448, Pivot to the Pacific? The Obama Administration’s “ Rebalancing ” Toward Asia, coordinated by

Comparing scalar-tensor gravity and f(R)-gravity in the Newtonian limit

International Nuclear Information System (INIS)

Capozziello, S.; Stabile, A.; Troisi, A.

2010-01-01

Recently, a strong debate has been pursued about the Newtonian limit (i.e. small velocity and weak field) of fourth order gravity models. According to some authors, the Newtonian limit of f(R)-gravity is equivalent to the one of Brans-Dicke gravity with ω BD =0, so that the PPN parameters of these models turn out to be ill-defined. In this Letter, we carefully discuss this point considering that fourth order gravity models are dynamically equivalent to the O'Hanlon Lagrangian. This is a special case of scalar-tensor gravity characterized only by self-interaction potential and that, in the Newtonian limit, this implies a non-standard behavior that cannot be compared with the usual PPN limit of General Relativity. The result turns out to be completely different from the one of Brans-Dicke theory and in particular suggests that it is misleading to consider the PPN parameters of this theory with ω BD =0 in order to characterize the homologous quantities of f(R)-gravity. Finally the solutions at Newtonian level, obtained in the Jordan frame for an f(R)-gravity, reinterpreted as a scalar-tensor theory, are linked to those in the Einstein frame.

Diagrammatic technique for calculating matrix elements of collective operators in superradiance

International Nuclear Information System (INIS)

Lee, C.T.

1975-01-01

Adopting the so-called ''genealogical construction,'' one can express the eigenstates of collective operators corresponding to a specified mode for an N-atom system in terms of those for an (N-1) -atom system. Using these Dicke states as bases and using the Wigner-Eckart theorem, a matrix element of a collective operator of an arbitrary mode can be written as the product of an m-dependent factor and an m-independent reduced matrix element (RME). A set of recursion formulas for the RME is obtained. A graphical representation of the RME on the branching diagram for binary irreducible representations of permutation groups is then introduced. This gives a simple and systematic way of calculating the RME. This method is especially useful when the cooperation number r is close to N/2, where almost exact asymptotic expressions can be obtained easily. The result shows explicitly the geometry dependence of superradiance and the relative importance of r-conserving and r-nonconserving processes. This clears up the chief difficulty encountered in the Dicke-Schwendimann approach to the problem of N two-level atoms, spread over large regions, interacting with a multimode radiation field

Measurements with high spectral resolution of backscattered radiation over clouds in the spectral range {Delta}{lambda} = 0.2 - 4.5 {mu}m. Final report; Spektral hochaufloesende Messungen rueckgestreuter Strahlung ueb Wolken im Spektralbereich {Delta}{lambda} = 0.2 - 4.5 {mu}m. Endbericht

Energy Technology Data Exchange (ETDEWEB)

Grassl, H [World Meteorological Organization (WMO), Geneva (Switzerland); Fischer, J [Freie Univ. Berlin (Germany). Inst. fuer Weltraumwissenschaften; Bakan, S [Max-Planck-Institut fuer Meteorologie, Hamburg (Germany); Armbruster, W [Freie Univ. Berlin (Germany). Inst. fuer Weltraumwissenschaften; Bartsch, B [Max-Planck-Institut fuer Meteorologie, Hamburg (Germany); Betancor, M [Hamburg Univ. (Germany). Meteorologisches Inst.; Kollewe, M [Hamburg Univ. (Germany). Meteorologisches Inst.; Schueller, L [Freie Univ. Berlin (Germany). Inst. fuer Weltraumwissenschaften

1996-12-31

The following five problems were to be investigated: 1. Explanation of the discrepancies between measured and calculated data for the absorption of solar radiation by clouds. 2. Verification and application of remote measuring methods for determining cloud height and optical density, droplet size distribution and liquid water concentrations within clouds, and cloud phases. 3. Derivation and verification of a remote measuring method for determining the total atmospheric vapour concentration. 4. Remote measuring of aerosol type and optical density. 5. Remote measurement of the total concentration of atmospheric trace gases (O{sub 3}, CO, SO{sub 2}, NO{sub 2}). (orig./KW) [Deutsch] Es sollten fuenf Teilziele untersucht werden: 1. Erklaerung der Diskrepanzen bei der Absorption der Sonnenstrahlung in Wolken, die im Vergleich von Messung und Strahlungstransportrechnung auftreten. 2. Verifizierung und Anwendung von Fernerkundungsverfahren zur Bestimmung von: - Wolkenhoehe und optischer Dicke der Wolken - Troepfchengroessenverteilung und Fluessigwassergehalt von Wolken - Wolkenphase. 3. Herleitung und Verifizierung eines Fernerkundungsverfahrens zur Bestimmung des Gesamtwasserdampfgehalts der Atmosphaere. 4. Fernerkundung von Aerosoltyp und optischer Dicke der Aerosole. 5. Fernerkundung des Gesamtgehalts atmosphaerischer Spurengase (O{sub 3}, CO, SO{sub 2} und NO{sub 2}). (orig./KW)

General scalar-tensor cosmology: analytical solutions via noether symmetry

Energy Technology Data Exchange (ETDEWEB)

Massaeli, Erfan; Motaharfar, Meysam; Sepangi, Hamid Reza [Shahid Beheshti University, Department of Physics, Tehran (Iran, Islamic Republic of)

2017-02-15

We analyze the cosmology of a general scalar-tensor theory which encompasses generalized Brans-Dicke theory, Gauss-Bonnet gravity, non-minimal derivative gravity, generalized Galilean gravity and also the general k-essence type models. Instead of taking into account phenomenological considerations we adopt a Noether symmetry approach, as a physical criterion, to single out the form of undetermined functions in the action. These specified functions symmetrize equations of motion in the simplest possible form which result in exact solutions. Demanding de Sitter, power-law and bouncing universe solutions in the absence and presence of matter density leads to exploring new as well as well-investigated models. We show that there are models for which the dynamics of the system allows a transition from a decelerating phase (matter dominated era) to an accelerating phase (dark energy epoch) and could also lead to general Brans-Dicke with string correction without a self-interaction potential. Furthermore, we classify the models based on a phantom or quintessence dark energy point of view. Finally, we obtain the condition for stability of a de Sitter solution for which the solution is an attractor of the system. (orig.)

Density fluctuations in extended inflation

International Nuclear Information System (INIS)

Guth, A.H.; Jain, B.

1992-01-01

We estimate the density perturbation spectrum δρ/ρ in the extended inflationary model, in which the scalar curvature is coupled to a Brans-Dicke field. Through a conformal transformation and a redefinition of the Brans-Dicke field, the action of the theory is cast into a form with no coupling to the scalar curvature and a canonical kinetic term for the redefined field. Following Kolb, Salopek, and Turner, we calculate δρ/ρ using the transformed action and the standard recipe developed for conventional inflation. This recipe is expected to give a valid order-of-magnitude estimate, but a precise calculation would require a more careful treatment of several aspects of the problem. The spectrum behaves as a positive power of the wavelength, a feature that might be useful in building models to account for the observed large-scale structure of the universe. Our result for the overall amplitude of density perturbations differs slightly from that of the previous authors, and the reasons for these differences are discussed. We also point out that the conformal transformation method can be applied to a wider class of generalized gravity theories

Cyclic multiverses

Science.gov (United States)

Marosek, Konrad; Dąbrowski, Mariusz P.; Balcerzak, Adam

2016-09-01

Using the idea of regularization of singularities due to the variability of the fundamental constants in cosmology we study the cyclic universe models. We find two models of oscillating and non-singular mass density and pressure (`non-singular' bounce) regularized by varying gravitational constant G despite the scale factor evolution is oscillating and having sharp turning points (`singular' bounce). Both violating (big-bang) and non-violating (phantom) null energy condition models appear. Then, we extend this idea on to the multiverse containing cyclic individual universes with either growing or decreasing entropy though leaving the net entropy constant. In order to get an insight into the key idea, we consider the doubleverse with the same geometrical evolution of the two `parallel' universes with their physical evolution [physical coupling constants c(t) and G(t)] being different. An interesting point is that there is a possibility to exchange the universes at the point of maximum expansion - the fact which was already noticed in quantum cosmology. Similar scenario is also possible within the framework of Brans-Dicke theory where varying G(t) is replaced by the dynamical Brans-Dicke field φ(t) though these theories are slightly different.

The tunneling universe in scalar-tensor theory with matter

International Nuclear Information System (INIS)

Lee, Sunggeun

2007-01-01

In this paper, the wavefunction of the universe with a tunneling boundary condition is considered in the context of the Brans-Dicke-type scalar-tensor theory with matter. The matter may be interpreted as a D-particle (or D0-brane) in string theory when the Brans-Dicke parameter ω is -1. We study two simple examples. The first example, the γ=0 (matter) case, has a scale factor duality even if the low energy string action is coupled to matter. The universe undergoes quantum transition from super-inflationary (pre-big-bang) to deflationary (post-big-bang) phase. We calculate the transition rate by solving the Wheeler-DeWitt equation and find that it is non-vanishing. The two phases are disconnected classically. The second example is the γ=1/3(radiation) case. With the help of earlier work this matter can be identified with a D0-brane in string theory. In this case, due to the absence of the scale factor duality and the complicated relations between scale factor and dilaton, it is hard to interpret the wavefunction as a pre- and post-big-bang phase

J. Swift, H. Melville y un cuento de Ana Lidia Vega: prostitución y metáforas de la migración.

Directory of Open Access Journals (Sweden)

Mercedes Rico García.

2008-06-01

Full Text Available En diálogo con Gulliver’s Travels de Jonathan Swift y Moby Dick de Herman Melville, y teniendo en mente la imagen degradada de la Estatua de la Libertad, a la que se compara con una ramera, Ana Lydia Vega en “Encancaranublado,” nos ofrece una personal perspectiva sobre las migraciones económicas que se desplazan de Latinoamérica a Estados Unidos. La autora construye su cuento sobre dos niveles: el real y el alegórico. Ambos planos ilustran la manera en que los ricos prostituyen a los pobres y en la que, en ocasiones, los pobres se prostituyen en términos metafóricos, para alcanzar el “Pursuit of Happiness.”Reading Ana Lydia Vega´s “Encancaranublado” in the light of Jonathan Swift´s Gulliver´s Travels and Herman Melville´s Moby Dick and taking into account the degraded image of the Statue of Liberty showed in Vega´s tale, the reader will have the opportunity to reflect from a controverted personal perspective upon the migrations going from Latin-America to the United States to pursue happiness.

Entanglement in a model for Hawking radiation: An application of quadratic algebras

International Nuclear Information System (INIS)

Bambah, Bindu A.; Mukku, C.; Shreecharan, T.; Siva Prasad, K.

2013-01-01

Quadratic polynomially deformed su(1,1) and su(2) algebras are utilized in model Hamiltonians to show how the gravitational system consisting of a black hole, infalling radiation and outgoing (Hawking) radiation can be solved exactly. The models allow us to study the long-time behaviour of the black hole and its outgoing modes. In particular, we calculate the bipartite entanglement entropies of subsystems consisting of (a) infalling plus outgoing modes and (b) black hole modes plus the infalling modes, using the Janus-faced nature of the model. The long-time behaviour also gives us glimpses of modifications in the character of Hawking radiation. Finally, we study the phenomenon of superradiance in our model in analogy with atomic Dicke superradiance. - Highlights: ► We examine a toy model for Hawking radiation with quantized black hole modes. ► We use quadratic polynomially deformed su(1,1) algebras to study its entanglement properties. ► We study the “Dicke Superradiance” in black hole radiation using quadratically deformed su(2) algebras. ► We study the modification of the thermal character of Hawking radiation due to quantized black hole modes.

Virtual processes and superradiance in spin-boson modes

International Nuclear Information System (INIS)

Alcalde, M. Aparicio; Kullock, R.; Svaiter, N.F.

2008-01-01

We consider spin-boson models composed by a single bosonic mode and an ensemble of N identical two-level atoms. The situation where the coupling between the bosonic mode and the atoms generates real and virtual processes is studied, where the whole system is in thermal equilibrium with a reservoir at temperature β -1 . Phase transitions from ordinary fluorescence to super radiant phase in three different models is investigated. First a model where the coupling between the bosonic mode and the j - th atom is via the pseudo-spin operator σ (j) z is studied. Second, we investigate the generalized Dicke model, introducing different coupling constants between the single mode bosonic field and the environment, g 1 and g 2 for rotating and counter-rotating terms, respectively. Finally it is considered a modified version of the generalized Dicke model with intensity-dependent coupling in the rotating terms. In the first model the zero mode contributes to render the canonical entropy a negative quantity for low temperatures. The last two models presents phase transitions, even when only Hamiltonian terms which generates virtual processes are considered. (author)

AD-1 with research pilot Richard E. Gray

Science.gov (United States)

1982-01-01

Standing in front of the AD-1 Oblique Wing research aircraft is research pilot Richard E. Gray. Richard E. Gray joined National Aeronautics and Space Administration's Johnson Space Center, Houston, Texas, in November 1978, as an aerospace research pilot. In November 1981, Dick joined the NASA's Ames-Dryden Flight Research Facility, Edwards, California, as a research pilot. Dick was a former Co-op at the NASA Flight Research Center (a previous name of the Ames-Dryden Flight Research Facility), serving as an Operations Engineer. At Ames-Dryden, Dick was a pilot for the F-14 Aileron Rudder Interconnect Program, AD-1 Oblique Wing Research Aircraft, F-8 Digital Fly-By-Wire and Pilot Induced Oscillations investigations. He also flew the F-104, T-37, and the F-15. On November 8, 1982, Gray was fatally injured in a T-37 jet aircraft while making a pilot proficiency flight. Dick graduated with a Bachelors degree in Aeronautical Engineering from San Jose State University in 1969. He joined the U.S. Navy in July 1969, becoming a Naval Aviator in January 1971, when he was assigned to F-4 Phantoms at Naval Air Station (NAS) Miramar, California. In 1972, he flew 48 combat missions in Vietnam in F-4s with VF-111 aboard the USS Coral Sea. After making a second cruise in 1973, Dick was assigned to Air Test and Evaluation Squadron Four (VX-4) at NAS Point Mugu, California, as a project pilot on various operational test and evaluation programs. In November 1978, Dick retired from the Navy and joined NASA's Johnson Space Center. At JSC Gray served as chief project pilot on the WB-57F high-altitude research projects and as the prime television chase pilot in a T-38 for the landing portion of the Space Shuttle orbital flight tests. Dick had over 3,000 hours in more than 30 types of aircraft, an airline transport rating, and 252 carrier arrested landings. He was a member of the Society of Experimental Test Pilots serving on the Board of Directors as Southwest Section Technical Adviser in

Variational formulation of two scalar-tetradic theories of gravitation

International Nuclear Information System (INIS)

Saez, D.

1983-01-01

In this paper we obtain two scalar-tetradic theories of gravitation (theories A and B) from a variational principle. In these theories the gravitational energy is localized and the principle of equivalence holds. They combine some aspects of Moller theory and the Brans-Dicke theory. The first-order approximations and an introduction to the study of both theories in the static spherically symmetric case are presented

Phase-locking in quantum and classical oscillators: polariton condensates, lasers, and arrays of Josephson junctions

OpenAIRE

EASTHAM, PAUL

2003-01-01

PUBLISHED We connect three phenomena in which a coherent electromagnetic field could be generated: polariton condensation, phase-locking in arrays of underdamped Josephson junctions, and lasing. All these phenomena have been described using Dicke-type models of spins coupled to a single photon mode. These descriptions may be distinguished by whether the spins are quantum or classical, and whether they are strongly or weakly damped.

USA asepresident vihastas Venemaad / Erkki Bahovski

Index Scriptorium Estoniae

Bahovski, Erkki, 1970-

2006-01-01

Ilmunud ka: Postimees : na russkom jazõke 15. mai lk. 9. Läänemere ja Musta mere piirkonna riikide tippkohtumisel Vilniuses esinenud USA asepresident Dick Cheney märkis, et Ameerikal ja Euroopal on raske näha Venemaad demokraatlike riikide seas, kuna reformivastased püüavad Venemaal hävitada möödunud kümnendi edusamme. Vt. samas: Eesti pakub abiks oma kogemusi

The United States Air Force Academy: A Bibliography 2001-2005

Science.gov (United States)

2006-01-01

Faldons. WEEKLY COMPILATION OF PRESIDENTIAL DOCUMENTS May 16, 2003: 612-613. PERIODICAL ARTICLES 31. Academy names new women’s basketball coach...succeed. CHECKPOINTS Fall 2003: 50-51. 382. Popovich, 󈨊, NBA Coach of the Year. CHECKPOINTS Spring 2003: 50. 383. Rauschkolb, Dick...178 185 Basketball 31 38 45 Battlebots Tournament 64 Beer, Heather 128 Bell, Luke 65 Benn, Elizabeth 245 Biancur, Andrew W 314 Big Brothers

Generalized field theory of gravitation

International Nuclear Information System (INIS)

Yilmaz, H.

1976-01-01

It is shown that if, on empirical grounds, one rules out the existence of cosmic fields of Dicke-Brans (scalar) and Will Nordvedt (vector, tensor) type, then the most general experimentally viable and theoretically reasonable theory of gravitation seems to be a LAMBDA-dependent generalization of Einstein and Yilmez theories, which reduces to the former for LAMBDA=0 and to the latter for LAMBDA=1

President saatis teele Estcoy-6 / Oliver Kund

Index Scriptorium Estoniae

Kund, Oliver

2008-01-01

President Toomas Hendrik Ilves kohtus peagi Afganistani suunduva jalaväekompaniiga Estcoy-6. Riigipea andis sõjaväelastele muuhulgas edasi kiidusõnad USA asepresidendilt Dick Cheney'lt, välisminister Condoleezza Rice'ilt ja USA keskväejuhatuse relvajõudude keskregiooni väejuhatuse staabi CENTCOM ülematelt. Juuresoleval fotol president T. H. Ilves koos miinipildujarühma nooremseersantide Janar Narme ja Aron Haljastega

Are particle rest masses variable: Theory and constraints from solar system experiments

International Nuclear Information System (INIS)

Bekenstein, J.D.

1977-01-01

Particle rest mass variation in spacetime is considered. According to Dicke, if this is the case various null experiments indicate that all masses vary in the same way. Their variation relative to the Planck-Wheeler mass defines a universal scalar rest-mass field. We construct the relativistic dynamics for this field based on very general assumptions. In addition, we assume Einstein's equations to be valid in Planck-Wheeler units. A special case of the theory coincides with Dicke's reformulation of Brans-Dicke theory as general relativity with variable rest masses. In the general case the rest-mass field is some power r of a scalar field which obeys an ordinary scalar equation with coupling to the curvature of strength q. The r and q are the only parameters of the theory. Comparison with experiment is facilitated by recasting the theory into units in which rest masses are constant, the Planck-Wheeler mass varies, and the metric satisfies the equations of a small subset of the scalar-tensor theories of gravitation. The results of solar system experiments, usually used to test general relativity, are here used to delimit the acceptable values of r and q. We conclude that if cosmological considerations are not invoked, then the solar system experiments do not rule out the possibility of rest-mass variability. That is, there are theories which agree with all null and solar system experiments, and yet contradict the strong equivalence principle by allowing rest masses to vary relative to the Planck-Wheeler mass. We show that the field theory of the rest-mass field can be quantized and interpreted in terms of massless scalar quanta which interact very weakly with matter. This explains why they have not turned up in high-energy experiments. In future reports we shall investigate the implications of various cosmological and astrophysical data for the theory of variable rest masses. The ultimate goal is a firm decision on whether rest masses vary or not

Conversational Dynamics in a Longitudinal Corpus of Caregiver-Child Interactions

DEFF Research Database (Denmark)

Weed, Ethan; Fusaroli, Riccardo; Tranbjerg, Jonas

Background:  Conversational turn-taking provides a scaffold that helps children learn the elements and rules of language (Dale & Spivey 2006, Yurofsky et al 2016). This relies heavily on social feedback and engagement (Fusaroli et al 2014), and thus conversations involving children with ASD are e...... their conversational turns to the child they are speaking with. This highlights the importance of investigating language acquisition in children with ASD within the context of dyadic interaction...

School-Based Service-Learning for Promoting Citizenship in Young People: A Systematic Review

Science.gov (United States)

2005-09-06

capital can not only produce social “goods” but also social “ bads ”; some forms of collective action are harmful to democracies. This review focuses on...criteria for this review and are summarized in the table below: Table 1: Included Studies Scales, Peter C., Blyth, Dale A., Berkas ...leadership,20 and “civic attitudes”.21 Berkas (1997) A copy of this evaluation (Strategic Review of the W. K. Kellogg Foundation’s Service-Learning

Qualitative Process Theory.

Science.gov (United States)

1984-07-01

solving common sense reasoning mathematical reasoning naive physics aritificial intelligence * 20. ABSTRACT (Continue o,, reverse side Ift necessary and...AD-A148 987 QUALITATIVE PROCESS THEORY(U) MASSACHUSETTS INST OF 1/2 TEEH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB K D FORBUS JUL 84 RI-TR-789 N88814-80...NATIONAL BUREAU Of STAN ARDS IJ% A 4 I .7 Technical Report 789 Q[-----Qualitative• Process M° Theory . Kenneth Dale Forbus MIT Artificial Intelligence

Disturbance of Soil Organic Matter and Nitrogen Dynamics: Implications for Soil and Water Quality

Science.gov (United States)

2004-06-30

Elliott, E.T., 1992. Particulate soil organic- matter changes across a grassland cultivation sequence. Soil Sci. Soc. Am. J. 56, 777–783. Dale, V.H...C.A., Elliott, E.T., 1992. Particulate soil organic-matter changes across a grassland cultivation sequence. Soil Science Society of America Journal...1645-1650. Van Straalen, N.M. 1997. How to measure no effect. 2. Threshold effects in ecotoxicology . Environmetrics 8: 249-253. Verburg, P.S.J

‘Liminal learners’ in a global city: the aspirations of young British Bangladeshi women at an east London secondary school

OpenAIRE

Vincent, Katharine

2013-01-01

Young British Bangladeshi women are often perceived as a marginalised, vulnerable group unlikely to succeed within the UK education system. Although achievement at GCSE level has improved significantly in recent years, female British Bangladeshis continue to be identified as an under-performing group at A-level and in higher education (Dale, 2002; Hussain, 2005). This article examines the educational experiences of a group of young British Bangladeshi women at one east London secondary school...

Cultural Resources Investigations at Redstone Arsenal, Madison County, Alabama. Volume I.

Science.gov (United States)

1980-01-01

units pro- hably based upon changes in projectile point themes. Although Walthall is probably right in predicting that the Lauder - dale phase is...investigations. According to him, During the WPA-TVA salvage program, time and money allowed investigation of only shell mounds, burial mounds, and other large...1813, becoming the first school in Alabama to be subsidized with public money . Alabama’s first bank, the Planters and 3 Mechanics Bank of Huntsville

RABIES IN NIGERIA: A REVIEW OF LITERATURE

African Journals Online (AJOL)

boaz

Elle est causée par le virus de la rage (RABV), une forme de balle, virus enveloppé à ARN,45 – 100nm de diamètre et 100 – 430 nm en longueur avec des saillies et des nucléocapsidehélicoïdale, l'un des virus encéphalite mieux connu de la famille. Rhabdoviridae et le genre Lyssavirus type 1. C'est unproblème majeur ...

Organic Matter in Space (IAU S251)

Science.gov (United States)

Kwok, Sun; Sanford, Scott

2009-01-01

Preface; From the local organising committee; Organising committee; Conference participants; Opening address of Symposium 251 C. Cesarsky; Session I. Observations of organic compounds beyond the Solar System William Irvine, Ewine van Dishoeck, Yvonne Pendleton and Hans Olofsson; Session II. Organic compounds within the Solar System Scott Sandford, Ernst Zinner and Dale Cruikshank; Session III. Laboratory analogues of organic compounds in space Max Bernstein and Thomas Henning; Banquet speech; Author index; Object index.

DIGITAL FLOOD INSURANCE RATE MAP DATABASE, DALE COUNTY, ALABAMA AND INCORPORATED AREAS

Data.gov (United States)

Federal Emergency Management Agency, Department of Homeland Security — The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk...

Blood and Gore, Fens and Fears: "Beowulf" Battles the Dale-Chall Monster.

Science.gov (United States)

Wagner, Betty Jane

Unfortunately, textbooks of the elementary and junior high school levels receive very little of the honest, critical evaluation which is given trade books in children's literature. One vivid example of this fact was seen in the recent arduous but successful attempt to include "Beowul" in a fourth-grade literature text which was being…

Book Reviews

Directory of Open Access Journals (Sweden)

Redactie KITLV

1993-01-01

Full Text Available -Louis Allaire, Samuel M. Wilson, Hispaniola: Caribbean chiefdoms in the age of Columbus. Tuscaloosa: University of Alabama Press, 1990. xi + 170 pp. -Douglas Melvin Haynes, Philip D. Curtin, Death by migration: Europe's encounter with the tropical world in the nineteenth century. Cambridge: Cambridge University Press, 1989. xviii + 251 pp. -Dale Tomich, J.H. Galloway, The sugar cane industry: An historical geography from its origins to 1914. Cambridge: Cambridge University Press, 1989. xii + 266 pp. -Myriam Cottias, Dale Tomich, Slavery in the circuit of sugar: Martinique and the world economy, 1830 -1848. Baltimore: John Hopkins University Press, 1990. xiv + 352 pp. -Robert Forster, Pierre Dessalles, La vie d'un colon à la Martinique au XIXe siècle. Pré-senté par Henri de Frémont. Courbevoie: s.n., 1984-1988, four volumes, 1310 pp. -Hilary Beckles, Douglas V. Armstrong, The old village and the great house: An archaeological and historical examination of Drax Hall Plantation, St Ann's Bay, Jamaica. Chicago: University of Illinois Press, 1990. xiii + 393 pp. -John Stewart, John A. Lent, Caribbean popular culture. Bowling Green OH: Bowling Green State University Popular Press, 1990. 157 pp. -W. Marvin Will, Susanne Jonas ,Democracy in Latin America: Visions and realities. New York: Bergin & Garvey Publishers, 1990. viii + 224 pp., Nancy Stein (eds -Forrest D. Colburn, Kathy McAfee, Storm signals: Structural adjustment and development alternatives in the Caribbean. London: Zed books, 1991. xii + 259 pp. -Derwin S. Munroe, Peggy Antrobus ,In the shadows of the sun: Caribbean development alternatives and U.S. policy. Carmen Diana Deere (coordinator, Peter Phillips, Marcia Rivera & Helen Safa. Boulder CO: Westview Press, 1990. xvii + 246 pp., Lynne Bolles, Edwin Melendez (eds -William Roseberry, Louis A. Pérez, Jr., Lords of the mountain: Social banditry and peasant protest in Cuba, 1878-1918. Pittsburgh: University of Pittsburgh Press, 1989

Generalized classes of continuous symmetries in two-mode Dicke models

Science.gov (United States)

Moodie, Ryan I.; Ballantine, Kyle E.; Keeling, Jonathan

2018-03-01

As recently realized experimentally [Nature (London) 543, 87 (2017), 10.1038/nature21067], one can engineer models with continuous symmetries by coupling two cavity modes to trapped atoms via a Raman pumping geometry. Considering specifically cases where internal states of the atoms couple to the cavity, we show an extended range of parameters for which continuous symmetry breaking can occur, and we classify the distinct steady states and time-dependent states that arise for different points in this extended parameter regime.

Dynamics of interacting Dicke model in a coupled-cavity array

Science.gov (United States)

Badshah, Fazal; Qamar, Shahid; Paternostro, Mauro

2014-09-01

We consider the dynamics of an array of mutually interacting cavities, each containing an ensemble of N two-level atoms. By exploring the possibilities offered by ensembles of various dimensions and a range of atom-light and photon-hopping values, we investigate the generation of multisite entanglement, as well as the performance of excitation transfer across the array, resulting from the competition between on-site nonlinearities of the matter-light interaction and intersite photon hopping. In particular, for a three-cavity interacting system it is observed that the initial excitation in the first cavity completely transfers to the ensemble in the third cavity through the hopping of photons between the adjacent cavities. Probabilities of the transfer of excitation of the cavity modes and ensembles exhibit characteristics of fast and slow oscillations governed by coupling and hopping parameters, respectively. In the large-hopping case, by seeding an initial excitation in the cavity at the center of the array, a tripartite W state, as well as a bipartite maximally entangled state, is obtained, depending on the interaction time. Population of the ensemble in a cavity has a positive impact on the rate of excitation transfer between the ensembles and their local cavity modes. In particular, for ensembles of five to seven atoms, tripartite W states can be produced even when the hopping rate is comparable to the cavity-atom coupling rate. A similar behavior of the transfer of excitation is observed for a four-coupled-cavity system with two initial excitations.

Separation of variables in anisotropic models: anisotropic Rabi and elliptic Gaudin model in an external magnetic field

Science.gov (United States)

Skrypnyk, T.

2017-08-01

We study the problem of separation of variables for classical integrable Hamiltonian systems governed by non-skew-symmetric non-dynamical so(3)\\otimes so(3) -valued elliptic r-matrices with spectral parameters. We consider several examples of such models, and perform separation of variables for classical anisotropic one- and two-spin Gaudin-type models in an external magnetic field, and for Jaynes-Cummings-Dicke-type models without the rotating wave approximation.

Tactical Web Services: Using XML and Java Web Services to Conduct Real-Time Net-Centric Sonar Visualization

Science.gov (United States)

2004-09-01

Rosetti USN U.S. Navy Chesterton, IN 6. Erik Chaum NUWC Newport, RI 7. David Bellino NPRI Newport, RI 8. Dick Nadolink NUWC Newport, RI...found at (http://www.parallelgraphics.com/products/cortona). G. JFREECHART JFreeChart is an open source Java API created by David Gilbert and...www.xj3d.org/. Accessed 3 September 2004. Hunter, David , Kurt Cagle, and Chris Dix, eds. Beginning XML, Second Edition. Indianapolis, IN

Scalar field mass in generalized gravity

International Nuclear Information System (INIS)

Faraoni, Valerio

2009-01-01

The notions of mass and range of a Brans-Dicke-like scalar field in scalar-tensor and f(R) gravity are subject to an ambiguity that hides a potential trap. We spell out this ambiguity and identify a physically meaningful and practical definition for these quantities. This is relevant when giving a mass to this scalar in order to circumvent experimental limits on the PPN parameters coming from solar system experiments.

Stability analysis of black holes via a catastrophe theory and black hole thermodynamics in generalized theories of gravity

International Nuclear Information System (INIS)

Tamaki, Takashi; Torii, Takashi; Maeda, Kei-ichi

2003-01-01

We perform a linear perturbation analysis for black hole solutions with a 'massive' Yang-Mills field (the Proca field) in Brans-Dicke theory and find that the results are quite consistent with those via catastrophe theory where thermodynamic variables play an intrinsic role. Based on this observation, we show the general relation between these two methods in generalized theories of gravity which are conformally related to the Einstein-Hilbert action